Find g(x), where g(x) is the translation 1 unit left of f(x)=x2.
write your answer in the form a(x–h)2+k, where a, h, and k are integers.
To find g(x), the translation 1 unit left of f(x) = x², we need to replace x with (x+1) because moving left means we need to subtract 1 from x. Therefore, g(x) = f(x+1) = (x+1)².
To write g(x) in the form a(x-h)² + k, we need to expand (x+1)² first. Using the formula (a+b)² = a² + 2ab + b², we get:
g(x) = (x+1)² = x² + 2x + 1
Now we can write g(x) in the vertex form by completing the square. We add and subtract (2/2)² = 1 to the expression to get:
g(x) = x² + 2x + 1 - 1 + 1
= (x+1)² + 0
Therefore, g(x) = (x+1)² + 0 is the vertex form of g(x), where a=1, h=-1, and k=0. This means that the vertex of the parabola g(x) is (-1,0), and it opens upwards. The translation 1 unit left of f(x)=x² results in a horizontal shift of the parabola to the left by 1 unit without changing its shape or orientation.
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A rectangular prism with a square base has a height of 17. 2 cm and a volume of 24. 768 cm3. What is the side length of its base?
The side length of the base of the rectangular prism is approximately 1.2 cm.
What is rectangular prism?The top, bottom, and lateral faces of a rectangular prism are all rectangles, and all the pairings of the opposing faces are congruent. A rectangular prism is a three-dimensional structure with six faces.
Let's denote the side length of the base of the rectangular prism as "x" cm.
We know that the volume of a rectangular prism is given by the formula:
Volume = Base Area x Height
In this case, the base is a square, so its area is given by:
Base Area = x²
We are given that the volume is 24.768 cm³ and the height is 17.2 cm.
Therefore, we can write the equation:
24.768 = x² * 17.2
To find the value of x, we can rearrange the equation:
x² = 24.768 / 17.2
x² = 1.4376
Taking the square root of both sides, we get:
x = √1.4376
x ≈ 1.2
Therefore, the side length of the base of the rectangular prism is approximately 1.2 cm.
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A bag of M&Ms has 4 blue, 8 red, 6 orange, 12 green M&Ms of equal size. If one M&M is selected at random, what is the probability it is NOT red?
The probability of selecting an M&M that is not red is 11/15.To find the probability of selecting an M&M that is not red, we need to first find the total number of M&Ms in the bag,
It is the sum of the number of M&Ms of each color: 4 + 8 + 6 + 12 = 30.
Next, we need to find the number of M&Ms that are not red, which is the sum of the number of M&Ms of all other colors: 4 + 6 + 12 = 22.
Therefore, the probability of selecting an M&M that is not red is 22/30, which can be simplified by dividing both the numerator and the denominator by 2:
22/30 = 11/15
So the probability of selecting an M&M that is not red is 11/15.
In other words, there is an 11/15 chance that the selected M&M will be blue, orange, or green, and a 4/15 chance that it will be red.It is important to note that this assumes that each M&M is equally likely to be selected, and that the bag is well-mixed so that each M&M has an equal chance of being chosen.
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What's the domain and range of the exponential growth function? (please help asappp no spam please or links or anything like that!!! will give brainliest)
domain: all real numbers; range: all real numbers
domain: x > –2; range: y > –2
domain: x < –2; range: all real numbers
domain: all real numbers; range: y > –2
Recall that the exponential growth function is defined as f(x) = [tex]a^x[/tex], where a is a positive constant greater than 1. Since any real number can be plugged in for x, the domain of the function is all real numbers.
What's the domain and range of the exponential growth function?
Since the exponential growth function increases without bound as x goes to infinity, the range of the function is all positive real numbers (y > 0). Similarly, as x approaches negative infinity, the function approaches zero but never equals zero. Therefore, the range of the function does not include zero or any negative numbers (y > 0).
So, the complete answer is:
Domain: all real numbers; Range: y > 0.
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a) Solid obtained by rotating the region bounded by y = r2 and y = 2, about the axis y = -2. b) Solid obtained by rotating the region bounded by y = VT, y=1, 1 = 4, about the axis r=-1.
The solid obtained by rotating the region bounded by y = r^2 and y = 2 about the axis y = -2 would be a three-dimensional shape with a hole in the middle. The axis of rotation is the line y = -2, which means that the solid will be formed by rotating the given region around this axis. The resulting shape will have a cylindrical section and two hemispherical sections on either end. The cylinder will have a height of 4 and a radius of 2, while the hemispheres will have radii of 2 and 4, respectively.
b) The solid obtained by rotating the region bounded by y = Vx, y = 1, and x = 4 about the axis r = -1 would be a three-dimensional shape with a conical section and a cylindrical section. The axis of rotation is the line r = -1, which means that the solid will be formed by rotating the given region around this axis. The resulting shape will have a cone-shaped section with a height of 4 and a base radius of 4, as well as a cylindrical section with a height of 1 and a radius of 4.
a) The solid obtained by rotating the region bounded by y = x^2 and y = 2 about the axis y = -2 is a parabolic cylinder. This is formed when the parabolic region between the two given functions is rotated around the specified axis, creating a three-dimensional shape with parabolic cross-sections.
b) The solid obtained by rotating the region bounded by y = √x, y = 1, x = 4, about the axis x = -1 is a torus-like shape. This is formed when the region enclosed by the square root function, the horizontal line at y = 1, and the vertical line at x = 4 is rotated around the specified axis, creating a donut-like shape with varying thickness.
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Part D Question Select the correct answer. How many bacteria will exist after 2 hours (120 minutes) have passed? Remember that 1 second of video time corresponds to 20 minutes of real time.
So after 6 hours, there will be approximately 262,144 bacteria.
What is exponent?An exponent (also called a power or index) is a mathematical notation that indicates the number of times a quantity is multiplied by itself. It is written as a superscript to the right of the quantity being multiplied. Exponents are commonly used in algebra and other branches of mathematics to represent repeated multiplication or to simplify complex expressions. They also have important applications in science, engineering, and computer programming.
Here,
We can use the formula for exponential growth to find the number of bacteria after a certain amount of time:
N = N0 * [tex]2^{(t/d)} ^[/tex]
where N is the final number of bacteria, N0 is the initial number of bacteria (which is 1 in this case), t is the time elapsed (in minutes), and d is the doubling time (in minutes).
Since the doubling time is 20 minutes, we have:
d = 20
To find the number of bacteria after 6 hours (which is 360 minutes), we plug in these values:
N = 1 * [tex]2^{(360/20)}[/tex]
Simplifying the exponent, we get:
N = 1 * [tex]2^{18}[/tex]
Using a calculator or by hand, we can evaluate this expression to get:
N ≈ 262,144
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PLS HELP DUE TODAY
LOOK AT SS
a.) the equation for g(x) is g(x) = 1.1x + 1.1
b.) The equation for g(x) is x = 10 which is the equation for a vertical line passing through (10, 15).
How do we calculate?An equation for g(x) in point-slope form is:
y - 15 = m(x - 10)
We have that g(x) = f(x) = -11 and that g(x) passes through the point (-1, 0),
use point-slope form to write the equation for g(x):
y - 0 = (-11)(x - (-1))
We simplify and then solve for y
y = -11x - 11
In conclusion, the equation for g(x) in slope-intercept form is:
g(x) = -11x - 11
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Ajay buys oranges in bulk for Rs. 20 each. He sells them for Rs. 45 each. Calculate the profit and the profit percentage
Ajay's profit on each orange is Rs. 25, and the profit percentage is 125%.
What is the profit and profit percentage?
Ajay makes a profit of Rs. 25 on each orange he sells, which is the difference between the selling price and the cost price. The profit percentage is calculated by dividing the profit by the cost price and then multiplying it by 100.
In this case, the cost price of each orange is Rs. 20 and the profit on each orange is Rs. 25. So, the profit percentage is (25/20) x 100 = 125%.
This means that Ajay is making a profit of 125% on each orange he sells, which is a significant profit margin. It also shows that buying in bulk at a lower price and selling at a higher price can be a profitable business strategy.
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Which equation represents the graph?
A: y = −2x + 1/2
B: y = −1/2x + 1/2
C: y = −2x − 2
D: y= -1/2 x -2
Answer: C
Step-by-step explanation:
since slope is rise/run its 2 and since the line is a negative slope the slope of the line is -2. and the y-intercept of the line is -2.
y = mx+b
m = -2
b= -2
Answer: C. y= -2x -2
TS
Not everyone pays the same price for
the same model of a car. The figure
illustrates a normal distribution for the
prices paid for a particular model of a
new car
99. 7%
95%
188%
nber of Car Buyers
What is the standard deviation: $
Enter your answer in the answer box.
The standard deviation for the prices paid for this particular model of car is $6,250.
How do pay within three standard deviations?Based on the figure you provided, we know that the data is normally distributed and approximately 68% of car buyers pay within one standard deviation of the mean, approximately 95% pay within two standard deviations, and approximately 99.7% pay within three standard deviations.
Since we know that 95% of the prices paid fall within two standard deviations of the mean, we can say that the distance between the mean and the upper or lower limit of this range is equal to two standard deviations. This is also known as the "95% confidence interval."
Therefore, to find the standard deviation, we can calculate the distance between the mean and either the upper or lower limit of the 95% confidence interval and then divide it by two.
From the figure, we can see that the 95% confidence interval extends from approximately $23,500 to $48,500. The midpoint of this interval is approximately $36,000, which we can take as the mean.
So, the distance between the mean and either end of the 95% confidence interval is:
$48,500 - $36,000 = $12,500
Dividing this by two gives us the standard deviation:
$12,500 / 2 = $6,250
Therefore, the standard deviation for the prices paid for this particular model of car is $6,250.
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Solve for w.
65=170-w
James runs 3 miles per day. Denis runs 4 per day. This month denis ran an additional 10 miles. Let j represent the number of days james ran this month, and let d represent the number denis ran this month. Write an expression to represent the number of miles both boys ran this month
An expression to represent the number of miles both boys ran this month is 3j + 4d + 10.
To begin solving this problem, we need to use the given information and create an expression to represent the number of miles both boys ran this month.
We know that James runs 3 miles per day, so in j days, he would have run 3j miles.
Similarly, Denis runs 4 miles per day and ran an additional 10 miles this month.
So in d days, he would have run 4d + 10 miles.
To find the total number of miles both boys ran this month, we need to add the number of miles James ran to the number of miles Denis ran.
Therefore, our expression is:
Total Miles = 3j + 4d + 10
This expression represents the total number of miles both boys ran this month.
To solve for j and d, we would need more information, such as the total number of miles the boys ran or the number of days they both ran.
In summary, we can use the given information about James and Denis's daily running habits to create an expression that represents the total number of miles both boys ran this month.
This expression is 3j + 4d + 10.
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Gina put all the boxes weighing less than 1/2 pound into a small box she puts all the boxes by more than 1/2 pound into a large box how many pounds heavier are the blocks in a large box than pounds in a small box
Weight difference between the large box and the small box is [tex](1/2)*(w2 - w1)[/tex] pounds.
How to find weight difference?Let's assume that Gina has n boxes in total, and let x be the weight of each box in pounds. We can then express the weight of the boxes that weigh less than [tex]1/2[/tex] pound as [tex](1/2)*w1[/tex], where [tex]w1[/tex] is the number of boxes that weigh less than [tex]1/2[/tex] pound. Similarly, we can express the weight of the boxes that weigh more than 1/2 pound as [tex](1/2)*w2[/tex], where [tex]w2[/tex] is the number of boxes that weigh more than [tex]1/2[/tex] pound.
Since Gina puts all the boxes weighing less than [tex]1/2[/tex] pound into a small box, the weight of the small box will be the sum of the weights of all the boxes that weigh less than [tex]1/2[/tex] pound, which is [tex](1/2)*w1[/tex].
Similarly, since Gina puts all the boxes weighing more than [tex]1/2[/tex] pound into a large box, the weight of the large box will be the sum of the weights of all the boxes that weigh more than [tex]1/2[/tex] pound, which is [tex](1/2)*w2[/tex].
The weight difference between the large box and the small box will be:
[tex](1/2)*w2 - (1/2)*w1[/tex]
Simplifying this expression, we get:
[tex](1/2)*(w2 - w1)[/tex]
Therefore, the weight difference between the large box and the small box is [tex](1/2)*(w2 - w1)[/tex] pounds.
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7. A company with several different
departments has its workers work one of
three shifts each workday. The president
of the company wants to know which of
the three shifts the workers prefer. What
is an efficient method for the president of
the company to get this information?
Answer: A voting system
Step-by-step explanation:
Consider the quadratic relation y=2(x-2)^2-18
write the relation in a standard form
what do u know about this relation
please quick
The standard form of the quadratic relation y=2(x-2)^2-18 is y=2x^2-8x-14.
The standard form of a quadratic relation is y=ax^2+bx+c, where a, b, and c are constants. To convert y=2(x-2)^2-18 to standard form, we need to expand the squared term and simplify the expression.
First, we expand the squared term to get y=2(x^2-4x+4)-18. Then, we distribute the 2 to get y=2x^2-8x+8-18. Finally, we simplify by combining like terms to get the standard form y=2x^2-8x-14.
This quadratic relation is a parabola with a vertex at (2,-18) and it opens upwards since the coefficient of x^2 is positive. The axis of symmetry is a vertical line passing through the vertex, and the y-intercept is -14.
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Suppose that uranus rotates on its axis once every 17.2 hours. the equator lies on a circle with a radius of 15,881 miles. (a) find the angular speed of a point on its equator in radians per day (24 hours). (b) find the linear speed of a point on the equator in miles per day. do not round any intermediate computations, and round your answer to the nearest whole number. (a) angular speed: radians per day (b) linear speed : miles per day
Uranus rotates on its axis at an angular speed of 0.355 radians per day, and a point on its equator travels at a linear speed of approximately 9,522 miles per day.
What is the angular and linear speed of a point on Uranus' equator?
Uranus is one of the gas giants in our solar system, and it has a unique orientation compared to the other planets. Its axis of rotation is tilted at an angle of 97.77 degrees relative to its orbit around the Sun, which means that it essentially spins on its side. This also means that its equator is located in a plane perpendicular to its orbit, unlike Earth's equator, which is in the plane of its orbit.
Given that Uranus rotates on its axis once every 17.2 hours and its equator lies on a circle with a radius of 15,881 miles, we can calculate the angular and linear speed of a point on its equator.
Angular speed is a measure of the rate of change of an angle with respect to time. In this case, we want to know the angular speed of a point on Uranus' equator in radians per day. To find this, we can start by calculating the angle that a point on the equator travels in one day, which is equal to the angular speed times the time, or 2π radians (a full circle).
So, the angular speed of a point on Uranus' equator is:
(2π radians)/(24 hours) = 0.2618 radians per hour
To convert this to radians per day, we multiply by the number of hours in a day:
0.2618 radians/hour × 24 hours/day = 0.355 radians per day
Therefore, a point on Uranus' equator travels at an angular speed of 0.355 radians per day.
Linear speed is a measure of the rate of change of position with respect to time. In this case, we want to know the linear speed of a point on Uranus' equator in miles per day. To find this, we can use the formula:
Linear speed = angular speed × radius
Where the radius is the distance from the center of Uranus to a point on its equator, which we are given as 15,881 miles.
So, the linear speed of a point on Uranus' equator is:
0.355 radians/day × 15,881 miles = 9,521.9 miles per day
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The experimental probability that Anna can throw a football
through a hoop is 60%. How many throws out of 20 can Anna
predict she will make?
O 18
O 12
O14
O 10
Answer:
12
Step-by-step explanation
60/100 to get the probability of success
0.6 * 20 attempts = 12
please help yall thank you
Answer:
1)3 pm
Step-by-step explanation:
1st) so till 12 15 he will have checked 3 patients and after the break the other two, I think he will finish at 3 pm
An oil globe made of hand blown glass of a diameter 22.6.what is the volume of globe.
If An oil globe made of hand-blown glass of a diameter of 22.6. Therefore, the volume of the oil globe is approximately 5704.8 cm^3.
The volume of a spherical object can be calculated using the formula:
V = (4/3)πr^3
where V is the volume, π is the mathematical constant pi (approximately equal to 3.14159), and r is the radius of the sphere.
In this case, we are given the diameter of the oil globe, which is 22.6. The radius is half of the diameter, so we can calculate the radius as:
r = d/2 = 22.6/2 = 11.3 cm
Substituting this value of radius in the formula for the volume of a sphere, we get:
V = (4/3)π(11.3)^3
V = 5704.8 cm^3 (rounded to one decimal place)
Therefore, the volume of the oil globe is approximately 5704.8 cm^3.
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Min wants to make 100 name tags with ribbons attached to them. Each name tag requires five centimeters of ribbon. She has 3. 25 meters of ribbon. Exactly how many more centimeters of ribbon does Mon still need to make 100 name tags?
Min still needs 175 centimeters of ribbon to make 100 name tags with ribbons attached to them.
To help Min with her name tags, we first need to determine the total amount of ribbon needed for 100 name tags. Each name tag requires 5 centimeters of ribbon, so for 100 name tags, we can calculate the total requirement as follows:
Total ribbon needed = (Number of name tags) x (Ribbon per name tag) = 100 x 5 = 500 centimeters
Min has 3.25 meters of ribbon, which we need to convert to centimeters to compare with the total requirement:
3.25 meters = 3.25 x 100 = 325 centimeters
Now, we can find out how many more centimeters of ribbon Min needs by subtracting the available ribbon from the total requirement:
Additional ribbon needed = Total ribbon needed - Available ribbon = 500 - 325 = 175 centimeters
So, Min still needs 175 centimeters of ribbon to make 100 name tags with ribbons attached to them.
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If you flip a coin 4 times what is the best prediction possible for the number of times it will land on tails?
Answer:it would still be a 50/50 chance of it be tails
Step-by-step explanation:
a coin has 2 sides. The probability would be 1/2. That means if you flip it a even amount, there would be a 50/tip chance. Let me know if I’m correct.
A baker has a small and large bag of sugar for making cakes. The large bag contains 30 cups of sugar and is 2. 5 times larger than the small bag. The small bag contains enough sugar to make 9 cakes and has 0. 75 cups of sugar remaining.
how many cakes can be made with a large bag of sugar?
After solving the word problem, the large bag contains enough sugar to make 40 cakes
Since the large bag is 2.5 times larger than the small bag, and the small bag contains enough sugar to make 9 cakes, the large bag contains enough sugar to make:
2.5 * 9 = 22.5 cakes
However, since there are only 30 cups of sugar in the large bag, and we don't know how much sugar is needed to make a single cake, we cannot determine the exact number of cakes that can be made with a large bag of sugar.
As for the small bag, if it had enough sugar to make 9 cakes and there are 0.75 cups of sugar remaining, then each cake requires:
(sugar in bag - remaining sugar) / number of cakes
= (9 - 0.75) / 9
= 0.75 cups of sugar
Therefore, the large bag contains enough sugar to make:
30 cups / 0.75 cups per cake
= 40 cakes
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Find the area of the following triangle:
5
3
4
Answer:6
Step-by-step explanation:3*4/2=6
PLEASE DO NOT ANSWER IT IF YOU PLAN ON TROLLING
The scatter plot shows the number of strawberries that have been picked on the farm during the month of February: A scatter plot with points showing an upward trend with points that are moderately spread out from a line of best fit. The y axis is labeled Number of Strawberries and the x axis is labeled Days in February Part A: Using computer software, a correlation coefficient of r = 0. 01 was calculated. Based on the scatter plot, is that an accurate value for this data? Why or why not? Part B: Instead of comparing the number of strawberries picked and the day in February, write a scenario that would be a causal relationship for strawberries picked on the farm
Weak correlation observed in scatter plot, inaccurate r=0.01 value; possible causal relationship - new fertilizer's effect on strawberry yields.
Part A: How accurate is the correlation coefficient?Based on the scatter plot, a correlation coefficient of r=0.01 is not an accurate value for this data. This is because the scatter plot shows an upward trend with moderately spread out points from the line of best fit, indicating a weak positive correlation. A correlation coefficient of 0.01 suggests a near-zero correlation, which is inconsistent with the observed pattern in the scatter plot.
Part B: How can a causal relationship be established?A possible scenario for a causal relationship for strawberries picked on the farm could be the application of a new fertilizer that is known to increase strawberry yields. The farmer could divide the field in half, applying the new fertilizer to one half and the traditional fertilizer to the other half, and then compare the yields of each half. This would allow for a comparison of the effect of the two different fertilizers on strawberry yields and establish a causal relationship between the fertilizer and the yield of strawberries.
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What is the surface area of the triangular prism?
6. 5 ft 8ft 6ft 2. 5ft
115
120
135
159
The surface area of the first triangular prism is 174.58 square feet and second triangular prism is 1721.6 square feet.
How to calculate the surface area?To calculate the surface area of a triangular prism, we need the measurements of the base and the height of the triangular bases, as well as the length of the prism.
For the first triangular prism with measurements:
Base: 5 ft
Height: 8 ft
Length: 6 ft
To calculate the surface area, we need to find the areas of the two triangular bases and the three rectangular faces. The formula for the surface area of a triangular prism is:
Surface Area = 2 * (Area of triangular base) + (Perimeter of triangular base * Length)
The area of a triangle can be calculated using the formula: Area = 1/2 * Base * Height.
Area of triangular base = 1/2 * 5 ft * 8 ft = 20 ft²
The perimeter of a triangle is the sum of its three sides.
Perimeter of triangular base = 5 ft + 8 ft + √(5 ft² + 8 ft²) = 5 ft + 8 ft + √89 ft ≈ 5 ft + 8 ft + 9.43 ft ≈ 22.43 ft
Surface Area = 2 * 20 ft² + (22.43 ft * 6 ft) = 40 ft² + 134.58 ft² = 174.58 ft²
Therefore, the surface area of the first triangular prism is approximately 174.58 square feet.
For the second triangular prism with measurements:
Base: 6 ft
Height: 2.5 ft
Length: 115 ft
Area of triangular base = 1/2 * 6 ft * 2.5 ft = 7.5 ft²
Perimeter of triangular base = 6 ft + 2.5 ft + √(6 ft² + 2.5 ft²) = 6 ft + 2.5 ft + √40.25 ft ≈ 8.5 ft + 6.34 ft ≈ 14.84 ft
Surface Area = 2 * 7.5 ft² + (14.84 ft * 115 ft) = 15 ft² + 1706.6 ft² = 1721.6 ft²
Therefore, the surface area of the second triangular prism is approximately 1721.6 square feet.
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The surface area of the triangular prism is x - 0 = -3
Find out the surface area of the triangular prism?If the solution to an absolute value equation is x = -3, then we know that the distance between x and 0 is 3 units. Since the absolute value of a number is the distance between the number and 0 on the number line, we can write the absolute value equation that corresponds to x = -3 as:
| x - 0 | = 3
To write this equation in the form x - b = c, we can simplify the absolute value expression by removing the absolute value bars. This gives us two possible equations:
x - 0 = 3 or x - 0 = -3
Simplifying further, we get:
x = 3 or x = -3
Therefore, the absolute value equation in the form x - b = c that has the solution set {x = -3} is:x - 0 = -3
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Rosemary chooses to attend the University of Houston to earn her degree. Rosemary has $2,500 in her savings and a $1,000 savings bond from her grandparents to use for college. What is the estimated contribution needed from other sources to pay for Rosemary's first year? Display keyboard shortcuts for Rich Content Editor
The estimated contribution for Rosemary's first-year college fee is $6,500 including all her savings and available funds.
Savings of Rosemary = $2,500
Savings from bond = $1000
To calculate the contribution needed for Rosemary from other sources, to pay her college fee, we need to add all the available funds and subtract the money for her college fee.
Let us imagine that the total cost of Rosemary's college = $10,000
Total available funds = $2,500 + $1,000
Total available funds = $3500
The remaining amount needed = $10,000 - $3,500 = $6,500
Therefore, we can conclude that Rosemary would need an estimated contribution of $6,500.
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The average first year teacher salary in a certain state is known to be $52,000 with a standard deviation of $1500. A researcher tests this claim by averaging the salaries of 25 first year teachers and finding their average salary to be $52,525. Is there significant evidence to suggest that the claim is wrong at the 5% significance level?
Option C is correct. No, the least value is smaller than the critical value.
Null hypothesis (H₀): The average first-year teacher salary is $52,000.
Alternative hypothesis (Ha): The average first-year teacher salary is not $52,000.
The significance level is 5% (or 0.05), which means we will reject the null hypothesis if the probability of obtaining the observed result is less than 5%.
Calculate the standard error of the mean:
Standard Error = Standard Deviation / √n
where n is the number of samples (n = 25 in this case).
Standard Error = $1500 / √25
= $1500 / 5
= $300
Now, perform the hypothesis test using a t-test since the sample size is relatively small (n < 30) and the population standard deviation is unknown.
t-score = (Sample Mean - Population Mean) / Standard Error
t-score = ($52,525 - $52,000) / $300
t-score = $525 / $300
t-score = 1.75
To find the critical value at a 5% significance level with 24 degrees of freedom (n - 1), we can consult a t-table. At a 5% significance level (two-tailed test), the critical t-value is approximately ±2.064.
Since the calculated t-score (1.75) is not greater than the critical t-value (2.064), we fail to reject the null hypothesis.
Therefore, option C is correct. No, the least value is smaller than the critical value.
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Complete question:
The average first year teacher salary in a certain state is known to be $52,000 with a standard deviation of $1500. A researcher tests this claim by averaging the salaries of 25 first year teachers and finding their average salary to be $52,525. Is there significant evidence to suggest that the claim is wrong at the 5% significance level?
A. Yes, the least value is greater than the critical value
B. No, the least value is larger than the critical value
C. No, the least value is smaller than the critical value
D. yes, the least value is smaller than the critical value
Write the equation of a circle that has a center at the point (-3, 6) and passes through the point (9, 1).
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The equation of the circle with a center at (-3, 6) and passing through the point (9, 1) is (x + 3)^2 + (y - 6)^2 = 169.
To write the equation of a circle with a center at the point (-3, 6) and passing through the point (9, 1), we can use the general equation of a circle: (x - h)^2 + (y - k)^2 = r^2, where (h, k) is the center of the circle, and r is the radius.
1. Identify the center (h, k) as (-3, 6).
2. Calculate the radius using the distance formula between the center and the given point (9, 1):
r = √((x2 - x1)^2 + (y2 - y1)^2)
r = √((9 - (-3))^2 + (1 - 6)^2)
r = √((12)^2 + (-5)^2)
r = √(144 + 25)
r = √169
r = 13
3. Substitute the values of h, k, and r into the equation of a circle:
(x - (-3))^2 + (y - 6)^2 = 13^2
(x + 3)^2 + (y - 6)^2 = 169
So, the equation of the circle with a center at (-3, 6) and passing through the point (9, 1) is (x + 3)^2 + (y - 6)^2 = 169.
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among american women aged 20 to 29 years, 10% are less than 60.8 inches tall, 80% are between 60.8 and 67.6 inches tall, and 10% are more than 67.6 inches tall.17 assuming that the height distribution can ade- quately be approximated by a normal curve, find the mean and standard deviation of the distribution
Answer:
mean height is approximately 64.2standard deviation is approximately 3.4 inchesStep-by-step explanation:
Since the distribution is approximately normal, we can use the empirical rule to estimate the mean and standard deviation.
According to the empirical rule:
Approximately 68% of the data falls within 1 standard deviation of the mean
Approximately 95% of the data falls within 2 standard deviations of the mean
Approximately 99.7% of the data falls within 3 standard deviations of the mean
From the information given in the problem, we know that:
10% of women are less than 60.8 inches tall
10% of women are more than 67.6 inches tall
So, we can estimate the mean height as the midpoint between 60.8 and 67.6:
mean = (60.8 + 67.6) / 2 = 64.2 inches
We also know that 80% of women are between 60.8 and 67.6 inches tall. Since this is approximately 1 standard deviation from the mean (on either side), we can estimate the standard deviation as:
standard deviation = (67.6 - 64.2) / 1 = 3.4 inches
Therefore, the mean height is approximately 64.2 inches and the standard deviation is approximately 3.4 inches.
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⊙O and ⊙P are given with centers (−2, 7) and (12, −1) and radii of lengths 5 and 12, respectively. Using similarity transformations on ⊙O, prove that ⊙O and ⊙P are similar. Explain
We have shown that ⊙O and ⊙P are similar using similarity transformations.
To prove that ⊙O and ⊙P are similar using similarity transformations, we need to show that they have the same shape . Let's consider a dilation transformation with a scale factor of 2, centered at point A, which is the midpoint of the line segment connecting the centers of ⊙O and ⊙P:
1.Draw a line segment connecting the centers of ⊙O and ⊙P, and label the midpoint of this line segment as point A.
2.Draw two radii from the centers of ⊙O and ⊙P to a point B on the circumference of ⊙O, and label the intersection point of AB and ⊙P as point C.
3.Draw a perpendicular line from point A to BC, and label the intersection point as point D.
4.Since AD is the perpendicular bisector of BC, we have BD = DC.
5.By the properties of dilation, the length of any line segment on ⊙O is doubled when it is transformed by a dilation with a scale factor of 2 centered at A.
6.Therefore, the length of BD is doubled to become BE, and the length of DC is doubled to become CF.
7.Since ⊙O is transformed to a circle with center A and radius 10, and ⊙P is transformed to a circle with center A and radius 24, we can see that they have the same shape but different sizes.
Therefore, we have shown that ⊙O and ⊙P are similar using similarity transformations.
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