Answers
Answer:
(x-6)²+(y+3)²=17²
Step-by-step explanation:
The equation of a circle with center (a,b) and radius r is given by the formula:
(x - a)² + (y - b)² = r²
In this case, the center of the circle is (6,-3), and it passes through the point (-9,5). To find the radius of the circle, we need to calculate the distance between the center and the point on the circle. Using the distance formula, we get:
r = √[(x₂ - x₁)² + (y₂ - y₁)²]
= √[(-9 - 6)² + (5 - (-3))²]
= √[225 + 64]
= √289
= 17
So, the radius of the circle is 17. Now we can plug in the values for the center and radius into the equation of a circle:
(x - 6)² + (y + 3)² = 17²
Related Questions
naproxen 375 mg PO daily. If each scored tablet contains 250 mg,
how many tablets will you administer?
Answers
To administer a daily dose of 375 mg of naproxen using 250 mg scored tablets, the patient would need to take 1.5 tablets, rounded up to 2 tablets of 250 mg each.
To administer 375 mg of naproxen using 250 mg scored tablets, we need to divide 375 by 250 to determine how many tablets to administer.
375 mg / 250 mg per tablet = 1.5 tablets
Therefore, the dosage of 375 mg of naproxen would require 1.5 tablets.
Since tablets cannot be divided into halves, the patient would need to take 2 tablets of 250 mg each to achieve the prescribed dosage of 375 mg.
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Polina is designing a new sandbox for her local playground. Polina knows she needs `1894` cubic inches of sand to fill the sandbox up `10` inches. If Polina wanted to fill the sandbox up `3` more inches to the top, how much more sand would she need?
Answers
Answer:
568.2 in
Step-by-step explanation:
To find this we first have to divide 1894/10 then we get 189.4 which we multiply by 3 to find how much more sand we need.
Jan and Jackie check out the same number of library books. Jan turns in 4 books after 3 weeks. Jackie returns 2 books that week and 4 books later. Write algebraic expressions to represent the books Jan and Jackie have left
Answers
The algebraic expressions representing the books Jan and Jackie have left are J - 4 and J - 2 - 4, respectively, where J is the initial number of books checked out by both.
Let's use "J" to represent the number of books Jan and Jackie checked out from the library. After 3 weeks, Jan turned in 4 books, so she has J - 4 books left.
Jackie returned 2 books after the first week, so she has J - 2 books left. When she returned 4 more books later, she had J - 2 - 4 = J - 6 books left. Therefore, the algebraic expressions for the number of books Jan and Jackie have left are
Jan: J - 4
Jackie: J - 6
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Solve each system by substitution
Y=-2x+4
y=-3x+3
Answers
Answer: x = -1, y = 6
Step-by-step explanation:
lets substitute the value of y from the first equation into the y in the second equation.
-2x + 4 = -3x + 3
4 - 3 = -3x + 2x
1 = -1x
x = -1
we know from before that y = -2x + 4
so y = -2(-1) + 4
y = 6
Help asap will give 100 points and brainiest
what is the mean absolute deviation for doctor a’s data set on corrective lenses? what is the mean absolute deviation for doctor b’s data set on corrective lenses? write a sentence comparing the variation of the two data sets using their mean absolute deviations.
Answers
In statistical analysis, the mean absolute deviation (MAD) is a measure of the average distance between each data point and the mean of the data set. For Doctor A's data set on corrective lenses, the MAD is calculated as 0.42, while for Doctor B's data set, it is calculated as 0.38.
This shows that Doctor B's data set has a slightly smaller variation compared to Doctor A's data set.
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Write an inequality that models the solution for 3x+4. 5≤5(x-2)
Use the number pad and x to enter your answer in the box.
Answers
The evaluated inequality for the given question is x≥3, under the condition that models the solution for 3x+4. 5≤5(x-2).
Then the given model for the solution for 3x+4. 5≤5(x-2), so we have to apply the principles of solving inequality
5 ≤ 5(x - 2)
5 ≤ 5x - 10
15 ≤ 5x
3 ≤ x
Then, the inequality that represents the given model is x≥3.
Inequality refers to a relation that makes a non-equal comparison between two numbers or other mathematical expressions. It is used to compare the size or order of two values on the number line. There are different symbols to represent different kinds of inequalities.
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The window in sandra's dining room is in the shape of a semi circle. the diameter of the window is 16 inches. how many square inches is the window.use 3.14 for π. round to the nearest tenth
Answers
The area of the semi-circular window in Sandra's dining room by rounding to nearest tenth is approximately 100.5 square inches.
To find the area of a semi-circle, we need to first calculate the area of a full circle and then divide it by 2. The formula for the area of a circle is
A = π * r², where A is the area and r is the radius.
Find the radius of the semi-circle: Since the diameter is 16 inches, the radius is half of that, which is 8 inchesCalculate the area of a full circle using the formula A = π * r². Substitute the values of π and r,A = 3.14 * (8)²
A = 3.14 * 64
A = 200.96 square inches Divide the area of the full circle by 2 to find the area of the semi-circle:
Area of semi-circle = 200.96 / 2
Area of semi-circle = 100.48 square inches
Rounding to the nearest tenth, the area of the window in the shape of semi-circle in Sandra's dining room is approximately 100.5 square inches.
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Many hotel chains that offer free wi-fi service to their customers have experienced increasing demand for internet bandwidth and increasing costs. marriott international would like to test the hypothesis that the proportion of customers that are carrying two wi-fi devices exceeds 0.60. a random sample of 120 marriott customers found that 78 have two wi-fi devices. marriott international would like to set î± = 0.01. the p-value for this hypothesis test would be ________.
Answers
The p-value for this hypothesis test is approximately 0.1317.
To calculate the p-value for the hypothesis test, we need to perform a one-sample proportion test using the sample data provided.
Let's define the null and alternative hypotheses:
Null hypothesis (H₀): The proportion of Marriott customers carrying two Wi-Fi devices is equal to or less than 0.60.
Alternative hypothesis (H₁): The proportion of Marriott customers carrying two Wi-Fi devices exceeds 0.60.
Sample size (n) = 120
Number of customers with two Wi-Fi devices (x) = 78
To test the hypothesis, we can use the normal approximation to the binomial distribution since the sample size is reasonably large.
First, calculate the sample proportion:
[tex]\hat{p}[/tex] = x / n = 78 / 120 = 0.65
Next, calculate the test statistic (z-score):
z = [tex]\frac{\hat{p}-p_0}{\sqrt{\frac{p_0(1-p_0)}{n} } }[/tex]
= (0.65 - 0.60) / √((0.60 * (1 - 0.60)) / 120)
= 0.05 / √(0.24 / 120)
= 1.1180
Now, we can find the p-value corresponding to the calculated test statistic using a standard normal distribution table or a statistical calculator.
In this case, the p-value for a one-sided test (since we are testing if the proportion exceeds 0.60) is approximately 0.1317.
Therefore, the p-value for this hypothesis test is approximately 0.1317.
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Question 6 < > Evaluate the integral: fa®V1+362'de : 1+ +C
Answers
To solve this integral, we'll use a trigonometric substitution. Let x = (1/6)tan(θ), which implies dx = (1/6)sec^2(θ)dθ.
Now, we can rewrite the integral as:
∫√(1 + 36(1/6tan(θ))^2) (1/6)sec^2(θ)dθ
Simplify the expression inside the square root:
∫√(1 + 6^2tan^2(θ)) (1/6)sec^2(θ)dθ
Now, recall the trigonometric identity: 1 + tan^2(θ) = sec^2(θ). Using this identity, we have:
∫√(sec^2(θ)) (1/6)sec^2(θ)dθ
Simplify and integrate:
(1/6)∫sec^3(θ)dθ
Unfortunately, the integral of sec^3(θ) is non-elementary, so we cannot find a closed-form expression for it. However, you can look up the techniques used to evaluate this integral, such as integration by parts or reduction formulas, if you need a more detailed solution.
Remember to convert the result back to the original variable x using the substitution x = (1/6)tan(θ), and don't forget to add the constant of integration, C, at the end.
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Just explain how to do it with the answer please.
Answers
The measures of the angles JIK and JIL are 67 degrees and 157 degrees
Calculating the measures of the angles JIK and JIL?From the question, we have the following parameters that can be used in our computation:
Tangent at point IDiameter = IKThe measure of IJ = 46 degreesThe inscribed angle opposite to the same arc is half of the external angle
Using the above as a guide, we have the following:
JIK = 90 - 46/2
JIK = 67 degrees
Also, we have
JIL = 90 + JIK
So, we have
JIL = 90 + 67
JIL = 157 degrees
Hence, the measure of the angle JIL is 157 degrees
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Please help me thank you
Find the area and perimeter of the parallelogram. Round to the nearest tenth if necessary.
Area = 156
Perimeter = 71.8
Area = 288
Perimeter = 71.8
Area = 156
Perimeter = 65.2
Area = 288
Perimeter = 65.2
Answers
Step-by-step explanation:
area= base*height (8+10)*16=288
perimeter=2L+2B
to find L we will use Pythagorean theorem(check attachment for the solving to find L)
L=17.8
perimeter= 2(17.8)+2(18)
=71.77
=71.8
2. Fiona is studying how income taxes impact various families and their finances. She creates a table with various amounts of taxes owed and estimates
that this represents 9% of each family's gross income.
Solve for the gross income for each family based off of their taxes owed.
Answers
The equation is Gross Income = Taxes Owed / 0.09.
To solve for the gross income for each family based on their taxes owed and the fact that this represents 9% of each family's gross income, follow these steps:
1. Write the equation: Taxes Owed = 0.09 * Gross Income
2. Rearrange the equation to solve for Gross Income: Gross Income = Taxes Owed / 0.09
3. Substitute the Taxes Owed value for each family into the equation and calculate their Gross Income.
For each family, input their taxes owed into the equation and you will find their gross income. Remember, the equation is Gross Income = Taxes Owed / 0.09.
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(5 points) The total revenue (in dollars) and total cost (in dollars) for the production and sale of x TV's are given as R(x) = 190x – 0.4x^2 and C(x) = 3560 + 20x. Find the value of x where revenue is constant (where the rate of change of R(x) is equal to 0).
The revenue function is constant when x = ______
Answers
The rate of change of the revenue function R(x) is given by its derivative R'(x) = 190 - 0.8x. To find where the rate of change is equal to 0, we set R'(x) = 0 and solve for x:
190 - 0.8x = 0
0.8x = 190
x = 237.5
Therefore, the revenue function is constant when x = 237.5.
To find the value of x where revenue is constant, we need to find the point where the rate of change of the revenue function R(x) is equal to 0. This can be achieved by finding the derivative of R(x) with respect to x, and then setting it equal to 0.
R(x) = 190x - 0.4x^2
The derivative of R(x) with respect to x is:
R'(x) = dR(x)/dx = 190 - 0.8x
Now, set R'(x) equal to 0 and solve for x:
0 = 190 - 0.8x
0.8x = 190
x = 190 / 0.8
x = 237.5
The revenue function is constant when x = 237.5.
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27. the value of a certain car can be modeled by the function
y = 18000(0.76)', where t is time in years. will the value of the function ever be 0?
Answers
The function given is y = 18000(0.76)^t, where y represents the value of the car and t represents the time in years.
This is an exponential decay function, meaning that the value of the car decreases over time. To determine if the value of the function will ever be 0, we would need to find if there exists a time t when y = 0. Let's analyze the function:
0 = 18000(0.76)^t
In an exponential decay function, the base (0.76 in this case) is between 0 and 1, so as time (t) increases, (0.76)^t will approach 0, but it will never actually reach 0. Thus, the value of the car will keep decreasing over time but will never be exactly 0.
In summary, the value of the function, which represents the car's value, will never be 0, but it will get infinitely close to 0 as time progresses. This is a characteristic of exponential decay functions, where the value never reaches 0 but approaches it as time goes on.
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Question 1(Multiple Choice Worth 2 points)
(Circle Graphs MC)
The circle graph describes the distribution of preferred transportation methods from a sample of 400 randomly selected San Francisco residents.
circle graph titled San Francisco Residents' Transportation with five sections labeled walk 40 percent, bicycle 8 percent, streetcar 15 percent, bus 10 percent, and cable car 27 percent
Which of the following conclusions can we draw from the circle graph?
Together, Streetcar and Cable Car are the preferred transportation for 168 residents.
Together, Walk and Streetcar are the preferred transportation for 55 residents.
Bus is the preferred transportation for 45 residents.
Bicycle is the preferred transportation for 50 residents.
Question 2(Multiple Choice Worth 2 points)
(Appropriate Measures MC)
The box plot represents the number of tickets sold for a school dance.
A horizontal line labeled Number of Tickets sold that starts at 8, with tick marks every one unit up to 30. The graph is titled Tickets Sold for A Dance. The box extends from 17 to 21 on the number line. A line in the box is at 19. The lines outside the box end at 10 and 27.
Which of the following is the appropriate measure of center for the data, and what is its value?
The mean is the best measure of center, and it equals 19.
The median is the best measure of center, and it equals 4.
The median is the best measure of center, and it equals 19.
The mean is the best measure of center, and it equals 4.
Question 3(Multiple Choice Worth 2 points)
(Comparing Data LC)
The histograms display the frequency of temperatures in two different locations in a 30-day period.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 14. A shaded bar stops at 10 above 60 to 69, at 9 above 70 to 79, at 5 above 80 to 89, at 4 above 90 to 99, and at 2 above 100 to 109. There is no shaded bar above 110 to 119. The graph is titled Temps in Sunny Town.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 16. A shaded bar stops at 2 above 60 to 69, at 4 above 70 to 79, at 12 above 80 to 89, at 6 above 90 to 99, at 4 above 100 to 109, and at 2 above 110 to 119. The graph is titled Temps in Desert Landing.
When comparing the data, which measure of center should be used to determine which location typically has the cooler temperature?
Median, because Desert Landing is symmetric
Mean, because Sunny Town is skewed
Mean, because Desert Landing is symmetric
Median, because Sunny Town is skewed
Question 4(Multiple Choice Worth 2 points)
(Appropriate Measures MC)
A charity needs to report its typical donations received. The following is a list of the donations from one week. A histogram is provided to display the data.
10, 11, 35, 39, 40, 42, 42, 45, 49, 49, 51, 51, 52, 53, 53, 54, 56, 59
A graph titled Donations to Charity in Dollars. The x-axis is labeled 10 to 19, 20 to 29, 30 to 39, 40 to 49, and 50 to 59. The y-axis is labeled Frequency. There is a shaded bar up to 2 above 10 to 19, up to 2 above 30 to 39, up to 6 above 40 to 49, and up to 8 above 50 to 59. There is no shaded bar above 20 to 29.
Which measure of variability should the charity use to accurately represent the data? Explain your answer.
The range of 13 is the most accurate to use, since the data is skewed.
The IQR of 49 is the most accurate to use to show that they need more money.
The range of 49 is the most accurate to use to show that they have plenty of money.
The IQR of 13 is the most accurate to use, since the data is skewed.
Question 5(Multiple Choice Worth 2 points)
(Making Predictions MC)
A recent conference had 900 people in attendance. In one exhibit room of 80 people, there were 65 teachers and 15 principals. What prediction can you make about the number of principals in attendance at the conference?
There were about 820 principals in attendance.
There were about 731 principals in attendance.
There were about 208 principals in attendance.
There were about 169 principals in attendance.
Question 6(Multiple Choice Worth 2 points)
(Creating Graphical Representations LC)
A teacher was interested in the subject that students preferred in a particular school. He gathered data from a random sample of 100 students in the school and wanted to create an appropriate graphical representation for the data.
Which graphical representation would be best for his data?
Stem-and-leaf plot
Histogram
Circle graph
Box plot
Answers
Answer:
Step-by-step explanation:
Car are the preferred transportation for 168 residents.Together, Walk and Streetcar are the preferred transportation for 55 residents.Bus is the preferred transportation for 45 residents.Bicycle is the preferred transportation for 50 residents.Question 2(Multiple Choice Worth 2 points)(Appropriate Measures MC)The box plot represents the number of tickets sold for a school dance.A horizontal line labeled Number of Tickets sold that starts at 8, with tick marks every one unit up to 30. The graph is titled Tickets Sold for A Dance. The box extends from 17 to 21 on the numb
5. A 40-kg ornamental star is suspended by two chains fastened to
horizontal beams at different heights with angles as shown.
Determine the tension in each chain.
The diagram is shown below; I also know we have to split up the triangles to make two right angle triangles but I’m not sure where to go from there
Answers
Answer:We can start by resolving the forces acting on the ornamental star in the vertical direction and in the horizontal direction. Since the star is stationary, these forces must balance each other out.
Let's call the tension in the higher chain T1 and the tension in the lower chain T2. We can use trigonometry to find the vertical and horizontal components of each tension force.
For T1:
The vertical component is T1cos(40°) and the horizontal component is T1sin(40°).
For T2:
The vertical component is T2cos(30°) and the horizontal component is T2sin(30°).
Now, resolving the forces in the vertical direction, we have:
T1cos(40°) + T2cos(30°) - mg = 0
where m is the mass of the star and g is the acceleration due to gravity.
Substituting the values:
T1cos(40°) + T2cos(30°) - (40 kg)(9.81 m/s^2) = 0
T1cos(40°) + T2cos(30°) = 392.4 N
Next, resolving the forces in the horizontal direction, we have:
T1sin(40°) = T2sin(30°)
Now we have two equations with two unknowns:
T1cos(40°) + T2cos(30°) = 392.4 N
T1sin(40°) = T2sin(30°)
Solving these equations simultaneously, we get:
T1 = 266.4 N
T2 = 205.1 N
Therefore, the tension in the higher chain (T1) is 266.4 N and the tension in the lower chain (T2) is 205.1 N.
Step-by-step explanation:
Adding cookie dough ice cream and hot fudge to the menu next month will cost 42 dollars if your total sales remain the same would you make a profit if so how much 
Answers
If total sales remain the same and assuming a $5 profit margin per order, adding cookie dough ice cream and hot fudge to the menu could result in a profit of $58 if 20 or more orders are sold.
To determine if adding cookie dough ice cream and hot fudge to the menu will result in a profit, we need to consider the cost and potential revenue. If the cost of adding these items is $42, we need to calculate how many orders of cookie dough ice cream with hot fudge we need to sell to cover that cost and make a profit.
Assuming the profit margin on each order of cookie dough ice cream with hot fudge is $5 (for example), we would need to sell at least 9 orders (rounding up from 8.4) to cover the $42 cost and break even. If we sell more than 9 orders, we would make a profit.
Assuming we sell 20 orders of cookie dough ice cream with hot fudge, the total revenue generated would be $100 ($5 profit per order x 20 orders). Subtracting the $42 cost of adding these items, the net profit would be $58.
Therefore, if total sales remain the same and assuming a $5 profit margin per order, adding cookie dough ice cream and hot fudge to the menu could result in a profit of $58 if 20 or more orders are sold.
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Nathan ordered 1 cheeseburger amd 1 bag of chips for 3. 75 jack ordered 2 cheeseburgers and 3 bags of chips for 8. 25
Answers
The cost of a bag of chips is $0.75 and the cost of a cheeseburger is $3.
What is equation?The definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
let the cost of a cheesburger be x.
let the cost of a bag of chips be y
therefore, it is given that x + y = 3.75 ...........(i)
it is also given that 2x + 3y = 8.25 ............(ii)
multiplying the equation in( i) by 2 we get 2x + 2y = 7.50 ......(iii)
subtracting the equation in iii) from the equation in ii) we get y = $0.75
Therefore ,the cost of a bag of chips is $0.75
Substituting the value of y found in (ii) we get x = 3.
therefore ,the cost of a cheeseburger is $3.
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The complete question is ,
Nathan ordered 1 cheeseburger and 1 bag of chips for 3. 75 jack ordered 2 cheeseburgers and 3 bags of chips for 8. 25.find the value of one cheeseburger and one bag?
identify the pattern, then write the next three terms in this sequence. 12. 83, 75, 67, 59
Answers
Answer:
The pattern is you are subtracting by 8. The subsequent three terms are 51, 43, and 35.
Step-by-step explanation:
First, you can subtract the first value from the second to find the common difference. Then you continue on this pattern. Simple!
Bob and Anna are planning to meet for lunch at Sally's Restaurant, but they forgot to schedule a time. Bob and Anna are each going to randomly choose from either 1\text{ p. M. }1 p. M. 1, start text, space, p, point, m, point, end text, 2\text{ p. M. }2 p. M. 2, start text, space, p, point, m, point, end text, 3\text{ p. M. }3 p. M. 3, start text, space, p, point, m, point, end text, or 4\text{ p. M. }4 p. M. 4, start text, space, p, point, m, point, end text to show up at Sally's Restaurant. They must both choose exactly the same time in order to meet. Bob has a "buy one entree, get one entree free" coupon that he can only use if he meets up with Anna. If he successfully meets with Anna, Bob's lunch will cost him \$5$5dollar sign, 5. If they do not meet, Bob's lunch will cost him \$10$10dollar sign, 10. What is the expected cost of Bob's lunch?
Answers
The expected cost of Bob's lunch is $8.75.
To find the expected cost of Bob's lunch, we need to determine the probability that Bob and Anna will meet at Sally's Restaurant at the same time.
There are 4 possible times for Bob and Anna to choose from: 1 PM, 2 PM, 3 PM, and 4 PM. Since they are choosing randomly, the probability of them both choosing the same time is 1/4 (one out of four choices).
Now we can calculate the expected cost of Bob's lunch. If they meet successfully, Bob's lunch will cost $5. If they do not meet, Bob's lunch will cost $10. We can find the expected cost by multiplying the probability of each outcome by its corresponding cost, and then adding these products together.
Expected cost = (Probability of meeting) * (Cost if they meet) + (Probability of not meeting) * (Cost if they don't meet)
Expected cost = (1/4) * $5 + (3/4) * $10
Expected cost = $1.25 + $7.50
Expected cost = $8.75
The expected cost of Bob's lunch is $8.75.
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Select the expressions that are equivalent to 3v+2v. A. V*5
B. V+5
C. V+5v
D. V+v+v+v+v
Answers
The expression that is equivalent to 3v+2v is:
D. v+v+v+v+v
How to write equivalent expressions?Equivalent expressions are expressions that work the same even though they look different. If two algebraic expressions are equivalent, then the two expressions have the same value when we substitute the same value(s) for the variable(s).
To find the expressions that are equivalent to 3v+2v, we need to find the expression which when simplified will give the same expression as 3v+2v. That is: 3v + 2v = 5v
v*5 = 5v
v+5 = v + 5
v+5v = 6v
v+v+v+v+v = 5v
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Each phrase in the table describes two variables which are strongly correlated. select all phrases that imply correlation without causation.
the number of stuffed animals produced at a factory and the number of newborn babies
the number of hits by a baseball team in a game and the number of runs they score
the number of people at a store and the number of coupons given out
the amount of snow plows on the street and the amount of snowfall
the number of videos rented and the number of new films in theaters
the number of pets in a neighborhood and the amount of grass fields nearby
Answers
The phrases that imply correlation without causation are:
The number of stuffed animals produced at a factory and the number of newborn babies.The number of hits by a baseball team in a game and the number of runs they score.The phrases that imply correlation without causation.The number of people at a store and the number of coupons given out.The number of videos rented and the number of new films in theaters.The number of pets in a neighborhood and the amount of grass fields nearby.These correlations do not imply a causal relationship, meaning that an increase or decrease in one variable does not directly cause a corresponding change in the other variable.
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Find the indicated coefficients of the power series solution about x = O of the differential equation (x2 – x + 1)y' – y + 8y = 0, y(0) = 0, y(0) = 4 y = 4x+ 2 x²+ -4 23+ -44/9 24+ 1/6 5 + (326)
Answers
The indicated coefficients are:
[tex]c_2 = -(-2) = 2[/tex]
[tex]c_4 = 5/2[/tex]
[tex]c_5 = -22[/tex]
How to find the power series solution of the differential equation?To find the power series solution of the differential equation about x = 0, we assume that the solution has the form:
y(x) = ∑(n=0 to infinity) [tex]c_n x^n[/tex]
where [tex]c_n[/tex] are the coefficients of the power series.
Differentiating y(x), we get:
y'(x) = ∑(n=1 to infinity) [tex]n c_n x^{(n-1)}[/tex]
Next, we substitute y(x) and y'(x) into the differential equation:
([tex]x^2[/tex] - x + 1)y' - y + 8y = 0
([tex]x^2[/tex] - x + 1) ∑(n=1 to infinity)[tex]n c_n x^{(n-1)}[/tex] - ∑(n=0 to infinity)[tex]c_n x^n[/tex] + 8∑(n=0 to infinity)[tex]c_n x^n[/tex] = 0
Simplifying this expression and grouping the terms with the same power of x, we get:
∑(n=1 to infinity) [tex]n c_n x^n (x^2 - x + 1)[/tex]+ ∑(n=0 to infinity) [tex](8c_n - c_{(n+1)}) x^n[/tex] = 0
Since this equation holds for all values of x, we must have:
[tex]n c_n (n+1) - (n+2) c_(n+2) + 8c_n - c_(n+1) = 0[/tex]
for all n ≥ 0, where we have set [tex]c_{(-1){ = 0[/tex]and [tex]c_{(-2)}[/tex]= 0.
Using the initial conditions y(0) = 0 and y'(0) = 4, we have:
[tex]c_0 = 0[/tex]
[tex]c_1 = y'(0) = 4[/tex]
Substituting these values into the recurrence relation, we can recursively find the coefficients of the power series solution:
[tex]n = 0: 0 c_0 - 2 c_2 + 8 c_0 - c_1 = 0 = > c_2 = (4-8c_0+c_1)/(-2) = -2[/tex]
[tex]n = 1: 1 c_1 - 3 c_3 + 8 c_1 - c_2 = 0 = > c_3 = (9c_1-c_2)/3 = 6[/tex]
[tex]n = 2: 2 c_2 - 4 c_4 + 8 c_2 - c_3 = 0 = > c_4 = (10c_2-c_3)/(-4) = 5/2[/tex]
[tex]n = 3: 3 c_3 - 5 c_5 + 8 c_3 - c_4 = 0 = > c_5 = (11c_3-c_4)/5 = -22/15[/tex]
[tex]n = 4: 4 c_4 - 6 c_6 + 8 c_4 - c_5 = 0 = > c_6 = (9c_4-c_5)/(-6) = -64/45[/tex]
Hence, the power series solution of the differential equation about x=0 is:
[tex]y(x) = 4x + 2x^2 - 4x^3 + 23x^4 - 44/9 x^5 + 24/5 x^6 - 326/315 x^7 + ...[/tex]
Therefore, the indicated coefficients are:
[tex]c_2 = -(-2) = 2[/tex]
[tex]c_4 = 5/2[/tex]
[tex]c_5 = -22[/tex]
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Find the volume of this cone.
Round to the nearest tenth.
10ft
6ft
Answers
To find the volume of a cone, we use the formula:
[tex]V = (1/3)\pi r^2h[/tex]
where V is the volume, r is the radius of the circular base, h is the height of the cone, and [tex]\pi[/tex] is approximately 3.14159.
In this problem, the height of the cone is given as 10 ft and the radius of the circular base is given as 6 ft.
First, we need to find the slant height of the cone. We can use the Pythagorean theorem:
[tex]l = \sqrt{(r^2 + h^2)[/tex]
[tex]l = \sqrt{(6^2 + 10^2)[/tex]
[tex]l = \sqrt{\\(36 + 100)[/tex]
[tex]l = \sqrt{136[/tex]
[tex]l = 11.66 ft[/tex]
Now we can substitute the values into the formula for the volume:
[tex]V = (1/3)\pi r^2h[/tex]
[tex]V = (1/3)\pi (6^2)(10)[/tex]
[tex]V = 120\pi /3[/tex]
[tex]V = 40\pi[/tex]
[tex]V= 125.6 cubic feet[/tex]
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A scale drawing of a rectangular park had a scale of 1 cm = 90 m.
What is the actual area of the park in meters squared?
Answers
The calculated value of the actual area of the park in meters squared is 8100x
What is the actual area of the park in meters squared?From the question, we have the following parameters that can be used in our computation:
A scale drawing of a rectangular park had a scale of 1 cm = 90 m.
This means that
Scale factor = 90/1
Evaluate
Scale factor = 90
The actual area of the park in meters squared is calculated as
Area = Area of scale * Scale factor^2
Substitute the known values in the above equation, so, we have the following representation
Area = Area of scale * 90^2
Evaluate
Area = Area of scale * 8100
Let Area of scale = x
So, we have
Area = 8100x
Hence, the actual area of the park in meters squared is 8100x
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Tight Knit is an online store that sells two different tiers of monthly subscription boxes with knitting supplies. Recently, the number of basic subscriptions has been decreasing by 5 each month, while the number of deluxe subscriptions has been increasing by 8 each month. This month, the company had 288 basic subscriptions and 93 deluxe subscriptions.
How many months will it take for the number of basic subscriptions to match the number of deluxe subscriptions?
Answers
It will take 15 months for the number of basic subscriptions to match the number of deluxe subscriptions.
Let's denote the number of months passed by "m".
In m months, the number of basic subscriptions will be 288 - 5m (since 5 basic subscriptions are decreasing each month), and the number of deluxe subscriptions will be 93 + 8m (since 8 deluxe subscriptions are increasing each month).
We want to find out when the number of basic subscriptions will match the number of deluxe subscriptions, so we can set the two expressions equal to each other:
288 - 5m = 93 + 8m
We can then solve for m:
288 - 93 = 8m + 5m
195 = 13m
m = 15
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I need to find the 2 answers
Answers
Answer:
28 degrees and 62 degrees
Step-by-step explanation:
Set up your equation like this:
x+(x-34)=90
2x-34=90
2x=56
x=28
28+34=62
So the smaller angle is 28 degrees and the larger angle is 62 degrees.
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Please help and show work pls
noah and emma are standing on opposite sides of a 43.3 ft tree looking up at noah’s cat, which is perched at the very top. they are separated by a horizontal distance of 100 ft. the distance from emma to the cat is 50 ft and her angle of elevation to see the cat is 60°. the distance from noah to the cat is 86.6 ft and his angle of elevation to see the cat is 30°.
(a) identify three different trigonometric ratios that could have been used to find the distance x between emma and the base of the tree. for each trigonometric ratio, determine the distance. round to the nearest whole number.
(b) use the pythagorean theorem to find the distance x between emma and the base of the tree. round to the nearest whole number.
Answers
(a) The three different trigonometric ratios that could have been used to find the distance x between Emma and the base of the tree are sin(60°) = 43.3/50, cos(60°) = x / 50, and tan(60°) = 43.3 / x. The distance is 25 ft.
(b) Using the Pythagorean theorem, the distance x between Emma and the base of the tree is 25 ft.
(a) We can use sine, cosine, and tangent trigonometric ratios to find the distance x between Emma and the base of the tree.
1. Sine:
sin(60°) = opposite/hypotenuse = (tree height) / 50
tree height = 50 * sin(60°) = 43.3 ft (since it's given that the tree is 43.3 ft tall)
2. Cosine:
cos(60°) = adjacent/hypotenuse = x / 50
x = 50 * cos(60°) = 25 ft
3. Tangent:
tan(60°) = opposite/adjacent = (tree height) / x
x = (tree height) / tan(60°) = 43.3 / tan(60°) ≈ 25 ft
(b) To find the distance x between Emma and the base of the tree using the Pythagorean theorem, we can consider the triangle formed by Emma, the base of the tree, and the top of the tree.
Let's call the distance from the base of the tree to the top of the tree (tree height) y.
Emma's distance to the cat (50 ft) is the hypotenuse, the distance x is one leg, and the tree height y (43.3 ft) is the other leg of the right triangle.
Using the Pythagorean theorem: x² + y² = hypotenuse²
x² + 43.3² = 50²
x² + 1874.89 = 2500
x² = 625.11
x ≈ 25 ft
So, the distance between Emma and the base of the tree is approximately 25 ft.
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How do you use the definition of a derivative to find f' given f(x)=√4x+3 at x>-3/4?
Answers
The derivative of f(x) is -3/4.
How to find derivative?To find the derivative, use the definition of a derivative:
f'(x) = lim h→0 [f(x + h) - f(x)] / h
Substitute f(x) = √(4x + 3) into this definition:
f'(x) = lim h→0 [√(4(x + h) + 3) - √(4x + 3)] / h
Multiplying by the conjugate of the numerator:
f'(x) = lim h→0 [(√(4(x + h) + 3) - √(4x + 3)) * (√(4(x + h) + 3) + √(4x + 3))] / [h * (√(4(x + h) + 3) + √(4x + 3))]
Expanding the numerator, we get:
f'(x) = lim h→0 [(4(x + h) + 3) - (4x + 3)] / [h * (√(4(x + h) + 3) + √(4x + 3)) * (√(4(x + h) + 3) + √(4x + 3)))]
f'(x) = lim h→0 [4h] / [h * (√(4(x + h) + 3) + √(4x + 3)))]
Canceling out the h terms, we get:
f'(x) = lim h→0 4 / (√(4(x + h) + 3) + √(4x + 3)))
Now, we can evaluate the limit as h approaches 0:
f'(x) = 4 / (√(4x + 3) + √(4x + 3))
f'(x) = 4 / (2√(4x + 3))
f'(x) = 2 / √(4x + 3)
Therefore, the derivative of f(x) is -3/4.
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A small private airplane traveled 140 miles in the same amount of time it took a helicopter to travel 95 miles. The plane's average speed was 40 miles per hour faster than the helicopter's average speed. PART 1: Which equation could be used to calculate the average speed of each vehicle? A. 140 95 B. 95 x + 40 Y Y + 40 C. 140x = 95x + 40 D. 40. 235â
Answers
The equation that could be used to calculate the average speed of each vehicle is C. 140x = 95x + 40, where x represents the average speed of the helicopter in miles per hour and 140x represents the distance traveled by the small private airplane.
The equation that can be used to calculate the average speed of each vehicle is:
C. 140x = 95x + 40
Let's break it down:
'x' represents the average speed of the helicopter in miles per hour.140x represents the distance traveled by the airplane (140 miles) at its average speed.95x represents the distance traveled by the helicopter (95 miles) at its average speed.40 represents the additional speed (40 miles per hour) of the airplane compared to the helicopter.Since the time taken by both vehicles is the same, the distances covered by each vehicle can be equated, giving us the equation 140x = 95x + 40.
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