1. This is not an example of a quasi-experimental design because the researcher randomly assigned participants to the two groups. In a quasi-experimental design, the researcher does not have full control over the assignment of participants to groups.
2. The dependent variable in this study is the word recall. It is the variable that the researcher is interested in measuring and is expected to be affected by the independent variable.
3. The independent variable in this study is sugar consumption. It is the variable that the researcher manipulated by assigning participants to one of two groups, sugar vs. no sugar.
The purpose of manipulating the independent variable is to examine its effect on the dependent variable, word recall.
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Exercise 11. 3. 1: Applying the pigeonhole principle - heights and times. About Apply the pigeonhole principle to answer the following questions. If the pigeonhole principle can not be applied, give a specific counterexample. (a) A team of three high jumpers all have a personal record that is at least 6 feet and less than 7 feet. Is it necessarily true that two of the team members must have personal records that are within four inches of each other
To apply the pigeonhole principle, we need to determine the number of pigeonholes and the number of pigeons. The pigeonhole principle cannot be applied to this question.
In this case, the" holes" are the high minidresses and the" lockers" are the ranges of particular records. Let's assume that the range of particular records is from 6 bases( 72 elevation) to 7 bases( 84 elevation). The difference between the upper and lower bounds of the range is
84- 72 = 12 elevation.
We can divide this range into five subintervals of length2.4 elevation( 72,74.4),(74.4,76.8),(76.8,79.2),(79.2,81.6), and(81.6, 84).
Since there are only five subintervals, but we've three high minidresses, it isn't inescapably true that two of the platoon members must have particular records that are within four elevation of each other. For illustration, if the three high minidresses have particular records of 6 bases 3 elevation( 75 elevation), 6 bases 7 elevation( 79 elevation), and 7 bases( 84 elevation), also none of them have particular records within four elevation of each other.
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Cuál es el valor de la razón del cambio cuando metemos un vaso de agua al tiempo al congelador por 15 minutos?
The value of the rate of change when we put a glass of water at room temperature is 1/3.
The pace at which one quantity changes in relation to another quantity is known as the rate of change function. Simply said, the rate of change is calculated by dividing the amount of change in one thing by the equal amount of change in another.
The connection defining how one quantity changes in response to the change in another quantity is given by the rate of change formula. The formula for calculating the rate of change from y coordinates to x coordinates is y/x = (y2 - y1)/. (x2 - x1 ).
Rate of change = change in temperature / time
= 10-5/15
=5 / 15
= 1/3
Therefore, the Rate of change is 1/3.
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Complete question;
What is the value of the rate of change when we put a glass of water at room temperature in the freezer for 15 minutes, what is its temperature at 5 minutes and then at 10 minutes.
Victoria has $200 of her birthday gift money saved at home, and the amount is modeled by the function h(x) = 200. She reads about a bank that has savings accounts that accrue interest according to the function s(x) = (1. 05)x−1. Explain how Victoria can combine the two functions to model the total amount of money she will have in her bank account as interest accrues after she deposits her $200. Justify your reasoning.
WILL GIVE BRANLIEST
The total amount of money Victoria will have in her bank account after x years can be modeled by the function f(x) = 200 * (1.05)ˣ.
How can we model Victoria's bank account growth over time?To model the total amount of money Victoria will have in her bank account after depositing her $200 and accruing interest over time, we can combine the two functions h(x) and s(x).
We can use the following formula to represent the total amount of money Victoria will have in her bank account after x years:
f(x) = h(x) + h(x) * s(x)
where h(x) represents the $200 that Victoria has saved at home, and h(x) * s(x) represents the amount of interest accrued on that $200 in x years according to the function s(x).
The justification for this formula is that the total amount of money Victoria will have in her bank account after x years is the sum of the initial amount of $200 and the interest accrued on that amount over x years.
The interest accrued can be calculated by multiplying the initial amount by the interest rate function s(x).
For example, if Victoria leaves her $200 in the bank for 5 years, the total amount of money she will have in her account can be calculated using the formula:
f(5) = h(5) + h(5) * s(5) = 200 + 200 * (1.05)⁴ ≈ $273.04
Therefore, the total amount of money Victoria will have in her bank account after x years can be modeled using the function f(x) = h(x) + h(x) * s(x).
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find a constant b so that y(t) = e^2t [1 4 b] is a solution of y′ = [4 1 3 2 3 3 −2 −1 −1]y.
We have found a value of b that makes y(t) = [tex]e^2t[/tex] [1; 4; -1/2] a solution of y′ = [4 1 3; 2 3 3; −2 −1 −1]y. To check if y(t) is a solution of y′ = Ay, we need to substitute it into the differential equation and see if it holds.
Let's start by finding y′:
y′(t) = [[tex]2e^2t, 8e^2t, 4be^2t[/tex]]
Now, let's find Ay:
Ay = [4 1 3; 2 3 3; −2 −1 −1] [1; 4; b] = [4+4b; 14; -5-b]
We want y(t) = e^2t [1; 4; b] to satisfy y′ = Ay, so we set them equal:
y′ = Ay
[[tex]2e^2t; 8e^2t; 4be^2t] = [4+4b; 14; -5-b] e^2t[/tex] [1; 4; b]
Expanding this equation, we get:
[tex]2e^2t[/tex]= (4+4b)[tex]e^2t[/tex]
[tex]8e^2t[/tex] = 14 [tex]e^2t[/tex]
[tex]4be^2t[/tex]= (-5-b) [tex]e^2t[/tex]
The second equation is always true, so we can ignore it. For the first equation, we can cancel out [tex]e^2t[/tex] on both sides to get:
2 = 4+4b
Solving for b, we get:
b = -1/2
Finally, we can substitute b = -1/2 back into the third equation to check if it holds:
4be^2t = (-5-b) [tex]e^2t[/tex]
-2e^2t = (-5 + 1/2)[tex]e^2t[/tex]
This equation is true, so we have found a value of b that makes y(t) = [tex]e^2t[/tex] [1; 4; -1/2] a solution of y′ = [4 1 3; 2 3 3; −2 −1 −1]y.
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Consider the following series: (-1)^ 71n n We will test this series for convergence or divergence. (i) What test(s) is(are) applicable to test this series? Click for List (i) Determine whether this series converges or diverges. O Converges O Diverges (iii) What is the sum of the series? Note: Write the exact answer not the decimal approximation (for example write 1 / not 0.8). Answer: The sum of the series is PO
The series given is (-1)^71n*n. To test for convergence or divergence, the alternating series test as the series alternates in sign. Also, the absolute value of the terms of the series is decreasing as n increases. In conclusion, the given series (-1)^71n * n diverges, and it does not have a finite sum.
According to the alternating series test, if a series alternates in sign, and the absolute value of its terms is decreasing as n increases, then the series converges.
Thus, the series converges.
To find the sum of the series, we use the formula for the sum of an alternating series:
Sum = (-1)^71*1 - (-1)^71*2 + (-1)^71*3 - (-1)^71*4 + ...
= (-1)^71*(1 - 2 + 3 - 4 + ...)
= (-1)^71*(n(n+1)/2)
= 0
Therefore, the sum of the series is 0.
I'd be happy to help you with your question. To determine the convergence or divergence of the series (-1)^71n * n, we can follow these steps:
(i) Since the series has terms that alternate in sign, we can use the Alternating Series Test to test for convergence.
(ii) To apply the Alternating Series Test, we must first verify that the sequence of positive terms is decreasing and has a limit of zero. In this case, the sequence of positive terms is given by "n". As "n" goes to infinity, the sequence increases, not decreases, and the limit is not zero. Therefore, the series (-1)^71n * n does not pass the Alternating Series Test, and it diverges.
(iii) Since the series diverges, it does not have a finite sum.
In conclusion, the given series (-1)^71n * n diverges, and it does not have a finite sum.
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The International Links long-distance phone company charges no monthly fee but charges 18 cents per minute for long-distance calls. The World Connections long distance company charges $50 per month plus 10 cents per minute for long-distance calls. Compare the World Connections long-distance plan to that of International Links. Under what circumstances is it cheaper to use International Links?
If the number of minutes used is less than 625 per month, it is more affordable to use International Links if not, you can go for World Connections.
Let us assume that the number of minutes used = x
Cost per minute = 18 cents
Total cost for International calls = 0.18x
Basci cahrge = 50 per month
If we use x number of minutes for calls for world connections then the total cost will be:
50 + 0.10x
To find the value of x where International Links cost is less than the total cost for World Connections
0.18x < 50 + 0.10x
0.08 < 50
8x < 50
x < 625
Therefore, we can infer that if the number of minutes used is less than 625 per month, it is cheaper to use International Links.
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Please help me with this
Answer:
B f(x)=1(8)^x
Step-by-step explanation:
1 is the 0 value, you can see it's exponential by the rapid growth and how it grows by a lot each time
When you don’t replace the marble for the second draw what kind of probability is it?
If you do not replace the marble after the first draw, the probability calculation depends on whether you are dealing with a dependent or an independent event.
The possibility or chance of an event occurring is measured by probability. It is a number between 0 and 1 (inclusive), where 0 denotes an impossibility and 1 denotes a certainty. By dividing the number of favorable outcomes by the total number of potential outcomes, the probability of an occurrence is determined. The field of mathematics known as probability studies the possibility that a certain event will take place. It is a way to quantify the possibility or likelihood that something will really happen.
For an independent event, assuming that the first draw had no bearing on the outcome of the second draw, in the case of an isolated occurrence, the chance of drawing a specific marble on the second draw would be the same as the likelihood of drawing that same marble on the first draw. For a dependent event, the outcome of the first draw would determine the possibility of drawing a specific marble on the second draw.
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The cost after the coupon is $21. 25 she decides to add a 20% tip. How much is she adding for a tip
If the cost after the coupon is $21.25 and she decides to add a 20% tip, she will be adding $4.25 for the tip.
Find out how much a 20% tip would be on a cost of $21.25 after applying a coupon.
Identify the total cost after the coupon.
In this case, the cost is $21.25.
Determine the percentage for the tip.
The tip percentage is given as 20%.
Convert the percentage to a decimal.
To do this, divide the percentage by 100. So, 20% divided by 100 is equal to 0.2.
Multiply the total cost by the tip percentage in decimal form.
Now, multiply $21.25 (total cost) by 0.2 (tip percentage as a decimal).
$21.25 x 0.2 = $4.25
Calculate the tip amount.
The tip amount is $4.25.
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In a study of the relationship between birth order and college success, an investigator found that 126 in a sample of 180 college graduates were firstborn or only children; in a sample of 100 nongraduates of comparable age and socioeconomic background, the number of firstborn or only children was 54. estimate the difference in the proportions of firstborn or only children for the two populations from which these samples were drawn. give a bound for the error of estimation.
The difference in the proportions of firstborn or only children for the two populations from which these samples were drawn is 0.16.The bound for the error of estimation is 95% confidence that the true difference in proportions of firstborn or only children for the two populations is between 0.058 and 0.262.
To estimate the difference in the proportions of firstborn or only children for the two populations, we can use the sample proportions and apply the formula:
p1 - p2 = (x1/n1) - (x2/n2)
where p1 and p2 are the true population proportions, x1 and x2 are the numbers of firstborn or only children in the samples, and n1 and n2 are the sample sizes.
Sample of college graduates: x1 = 126, n1 = 180Sample of non-graduates: x2 = 54, n2 = 100The sample proportions,
p1 = x1/n1 = 0.7
p2 = x2/n2 = 0.54
Substituting these values into the formula,
p1 - p2 = (x1/n1) - (x2/n2) = 0.7 - 0.54 = 0.16
Therefore, we estimate that the difference in the proportions of firstborn or only children for the two populations is 0.16.
To find a bound for the error of estimation, we can use the formula:
E = z sqrt(p1*(1-p1)/n1 + p2*(1-p2)/n2)
where E is the margin of error, z is the critical value for the desired level of confidence (we'll use z = 1.96 for a 95% confidence interval), and p1 and p2 are the sample proportions.
Substituting the given values, we get:
E = 1.96sqrt(0.7(1-0.7)/180 + 0.54*(1-0.54)/100) ≈ 0.102
Therefore, we can say with 95% confidence that the true difference in proportions of firstborn or only children for the two populations is between 0.058 and 0.262
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Twenty students in A and 20 students in class B were asked how many hours they took to prepare for an exam. The data sets represents their answers
The data sets represent the answers of twenty students in Class A and twenty students in Class B regarding the number of hours they took to prepare for an exam. These data sets are important because they help us understand the study habits and time allocation of the students in each class.
To analyze the data sets, first, collect the data from each student in both classes. Record the number of hours they took to prepare for the exam, ensuring you have 20 responses from Class A and 20 from Class B. Then, you can compute the average, or mean, time spent for each class by summing up the hours reported by all students in each class and dividing by 20.
Next, compare the averages for Class A and Class B to determine if there is a significant difference in the time spent preparing for the exam. Additionally, you can calculate other statistical measures such as median and mode to gain further insight into the data sets.
Furthermore, analyzing the distribution of the data, such as the range, will provide information on the variability of the time spent studying in each class. This can help identify any trends or patterns in the students' preparation time.
In conclusion, the data sets representing the number of hours spent by students in Class A and Class B to prepare for an exam can provide valuable insights into their study habits, the effectiveness of their preparation, and any possible correlations between time spent studying and exam performance.
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Which scatter plot below would best be modeled by using linear regression?
Answer:
Top
Step-by-step explanation:
The closer the data points come to forming a straight line when plotted, the higher the correlation between the two variables, or the stronger the relationship. Therefore, the top option has the most closest lines to a linear function.
(Ex. 1) Y=4x-2
This example shows the corresponding possibilities of a linear regression because of the way the line is represented as graphed, making a straight line as similar to the top option
(Ex. 2) f(x) = x^2-5+15
This example dialates to a similar option like the third option, which isnt linear regression because of it being a quadratic function.
In a nut shell, all data plotted on the graph that are formed closer together and corresponds to a linear equation is a linear regression
!!PLEASE HELPP!! (check if I’m right pls)
Answer: It's correct
Step-by-step explanation:
A savings account balance is compounded annually. if the interest rate is 2% per year and the current balance is $1430.00 what will the balance be 8 years from now
Answer:
A = P(1 + r/n)^(nt)
Where:
A = the future balance
P = the present balance ($1430.00)
r = the annual interest rate (2% or 0.02)
n = the number of times the interest is compounded per year (since it's compounded annually, n = 1)
t = the number of years (8 years in this case)
Plugging in the values into the formula:
A = 1430(1 + 0.02/1)^(1*8)
Simplifying the equation:
A = 1430(1.02)^8
Using a calculator or performing the calculations manually:
A ≈ 1430(1.171661)
A ≈ 1674.02
the balance after 8 years will be approximately $1674.02.
Zola wrote the area of the rectangle as `2a+3a+4a`.
amir wrote the area as `(2+3+4) a.
explain why they are both correct
please help as quickly as possible
assp
Both Zola and Amir are correct in writing the area of the rectangle. They have simply used different ways of expressing the same value.
Zola and Amir have both written the area of a rectangle using different algebraic expressions.
Zola wrote the area of the rectangle as `2a + 3a + 4a`, which can be simplified using the distributive property of multiplication:
2a + 3a + 4a = (2 + 3 + 4)a
Therefore, Zola's expression simplifies to `(2 + 3 + 4)a`, which is the same as Amir's expression.
Amir wrote the area of the rectangle as `(2 + 3 + 4) a`, which can also be simplified:
(2 + 3 + 4) a = 9a
Therefore, Amir's expression simplifies to `9a`, which is the same as the sum of the terms in Zola's expression.
Therefore, both Zola and Amir are correct in writing the area of the rectangle. They have simply used different ways of expressing the same value.
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Scientists estimate that the mass of the sun is 1. 9891 x 10 kg. How many zeros are in this
number when it is written in standard notation?
A 26
B 30
C 35
D 25
There are 30 zeros in the mass of the sun which is 1.9891 x 10³⁰ kg when it is written in standard notation. The correct answer is option B.
To determine how many zeros are in the mass of the sun (1.9891 x 10³⁰ kg) when it is written in standard notation, you first need to recognize that the provided mass is not written correctly. It should be written as 1.9891 x 10^n kg, where n is an integer representing the exponent.
The actual mass of the sun is 1.9891 x 10³⁰ kg. When written in standard notation, this number would be:
1,989,100,000,000,000,000,000,000,000,000 kg
There are 30 zeros in this number when written in standard notation.
So, the correct answer is B) 30.
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Find the difference. Express the answer in scientific notation. (8. 64 times 10 Superscript 20 Baseline) minus (7. 83 times 10 Superscript 20 Baseline) 8. 1 times 10 Superscript 19 0. 81 times 10 Superscript 20 8. 1 times 10 Superscript 21 0. 81 times 10 Superscript 40
In scientific notation, the difference between (8.64 x 10^20) and (7.83 x 10^20) is expressed as 8.1 x 10^19.
To find the difference between (8.64 x 10^20) and (7.83 x 10^20), we subtract the second number from the first:
8.64 x 10^20 - 7.83 x 10^20 = 0.81 x 10^20
Since the difference is less than one, we express the answer in scientific notation by moving the decimal point one place to the left and increasing the exponent by one:
0.81 x 10^20 = 8.1 x 10^19
Therefore, the difference between (8.64 x 10^20) and (7.83 x 10^20) expressed in scientific notation is 8.1 x 10^19.
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In a random sample of 74 homeowners in a city, 22 homeowners said they would
support a ban on nonnatural lawn fertilizers to protect fish in the local waterways. The sampling
method had a margin of error of ±3. 1%.
A) Find the point estimate.
B) Find the lower and upper limits and state the interval
Point estimate is 29.7%.
The confidence interval for the proportion of homeowners who support the ban on nonnatural lawn fertilizers is (26.6%, 32.8%).
A) The point estimate is the proportion of homeowners who support the ban on nonnatural lawn fertilizers.
In this case, 22 out of 74 homeowners support the ban. To find the point estimate, divide the number of supporters (22) by the total number of homeowners in the sample (74):
Point estimate = 22 / 74 ≈ 0.297 or 29.7%
B) To find the lower and upper limits, we need to consider the margin of error (±3.1%). Subtract the margin of error from the point estimate for the lower limit, and add the margin of error to the point estimate for the upper limit:
Lower limit = 29.7% - 3.1% = 26.6%
Upper limit = 29.7% + 3.1% = 32.8%
The confidence interval for the proportion of homeowners who support the ban on nonnatural lawn fertilizers is (26.6%, 32.8%).
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A track has the dimensions shown.
36.5 m
ISTAN
SAMANT
men komm
84.4 m
Ta
inside of track
outside of track
. The track has 8 lanes
• Each lane is 2.1 meters wide
36.5 m
O
TI
16. To the nearest tenth of a meter, what is
the perimeter of the outside of the
track?
Byp
*REQUIRED
ANA
1
√x
Sign out
Answer:
Step-by-step explanation:
Michael had 8/9 of a spool of yarn. He used 2/5 of his yarn for a project. What fraction of the spool was used for the project?
Answer:16/45 of his yarn
Step-by-step explanation:
8/9 x 2/5 = 16/45
Bus stops A, B, C, and D are on a straight road. The distance from A to D is exactly 1 km. The distance from B to C is 2 km. The distance from B to D is 3 km, the distance from A to B is 4 km, and the distance from C to D is 5 km. What is the distance between stops A and C? AC=_ km
The distance between bus stops A and C is exactly 1 km.
To find the distance between bus stops A and C, we can use the fact that the distance from A to D is 1 km and the distance from C to D is 5 km.
This means that the total distance from A to C, passing through D, is 6 km (1 km + 5 km).
However, we need to subtract the distance between B and D (3 km) and the distance between B and C (2 km) since we don't want to double count the stretch between B and D.
Therefore, the distance between A and C is 6 km - 3 km - 2 km = 1 km.
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Which relationship does not represent a direct proportion?
A. y = −
3
8
x
B.
Pounds Cost
3 $3.87
5 $6.45
8 $10.32
C. A dog groomer charges $15 per hour.
D.
The correct relationship which does not represent a direct proportion is,
⇒ A dog groomer charges $15 per hour.
Given that;
The graph is shown relation between number of minutes and Distance.
Take two points on the line are,
(2, 100) and (4, 150)
Hence, From graph we get;
The equation of line is,
⇒ y - 100 = (150 - 100)/ (4 - 2) (x - 2)
⇒ y - 100 = 25 (x - 2)
⇒ y - 100 = 25x - 50
⇒ y = 25x - 50 + 100
⇒ y = 25x + 50
Thus, The correct relationship which does not represent a direct proportion is,
⇒ A dog groomer charges $15 per hour.
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4) Your phone needs to be charged every other day and your tablet needs to be charged every third day. If you charge both today, how many days will it be until you need to charge both on the same day?
Answer:
If they were both charged today, it would be on the sixth day that they were actually charging at the same time
At the start of an observation, there are 7286.9 grams of a radioactive element present. The number of years t that must pass before N grams remain is given by the natural logarithm equation
t = 7,286.9 - 1,252 In(IV).
, dit
Find dt/dn When N = 15. Round to 2 decimal places, if necessary.
The value of dt/dN when N = 15 is -0.00509.
We are given the equation t = 7,286.9 - 1,252 ln(N/IV) which relates the number of years t that must pass before N grams of a radioactive element remain. We want to find the rate of change of t with respect to N, i.e., dt/dN when N = 15.
We can start by taking the derivative of both sides of the equation with respect to N:
dt/dN = -1252 / (N*ln(2))
Now we can substitute N = 15 into this equation to get:
dt/dN = -1252 / (15*ln(2))
Evaluating this expression, we get dt/dN ≈ -0.00509 (rounded to 2 decimal places). Therefore, the rate of change of t with respect to N when N = 15 is approximately -0.00509 years per gram.
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Please help this is for a test and i need a good grade lollll
"the wind force f on a sail varies jointly as the area al of the sall and the square of the wind speed w.
the force on a sail with area an area of 500 p? is 64.8 pounds when the wind speed is 18 mph. what
would be the force for a sail with an area of 250 f12 with a wind speed of 35 mph"
please show step by step work tysmmmm <3
The force on a sail with an area of 250 f12 and a wind speed of 35 mph would be 108.72 pounds.
How to find force on sail?We are given that the wind force F on a sail varies jointly as the area A and the square of the wind speed W. We can represent this relationship mathematically using the equation:
F = k * A * W²
where k is a constant of proportionality.
We are also given that the force on a sail with an area of 500 p and wind speed of 18 mph is 64.8 pounds. We can use this information to solve for k:
64.8 = k * 500 * 18²
Solving for k, we get:
k = 64.8 / (500 * 18²)
k = 0.0000768
Now, we can use the equation to find the force for a sail with an area of 250 f12 and a wind speed of 35 mph:
F = 0.0000768 * 250 f12 * 35²
F = 108.72 pounds
Therefore, the force on a sail with an area of 250 f12 and a wind speed of 35 mph would be 108.72 pounds.
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pls solve this asap
Step-by-step explanation:
perimeter of triangle=22 cm
AB+BC+CA=22cm
AB+4+AB =22cm (given,AB=AC)
2AB+4cm=22cm
2AB=22-4cm
2AB=18
AB=18÷2
AB=9cm
At a certain vineyard it is found that each grape vine produces about 10 lb of grapes in a season when about 800 vines are planted per acre. for each additional vine that is planted, the production of each vine decreases by about 1 percent. so the number of pounds of grapes produced per acre is modeled by
a(n) = (800 + n)(10 − 0.01n)
where n is the number of additional vines planted. find the number of vines that should be planted to maximize grape production.
Planting an additional 210 vines will maximize grape production.
How to maximize grape production?To find the number of vines that should be planted to maximize grape production, we need to find the maximum value of the function A(n) = (800 + n)(10 - 0.01n), which represents the number of pounds of grapes produced per acre as a function of the number of additional vines planted. To find the maximum value, we can take the derivative of A(n) with respect to n and set it equal to zero.
A'(n) = -0.01n² + 2.1n + 800
Setting A'(n) = 0, we get
-0.01n²+ 2.1n + 800 = 0
Solving for n using the quadratic formula, we get
n ≈ 210
Therefore, planting an additional 210 vines will maximize grape production.
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Find a formula for the slope of the graph of fat the point (x, f(x)). Then use it to find the slope at the two given points.
The slope at the given points are -1/36 and -1/16 respectively.
Given is a function f(x) = 1/x+6 we need to find the slope of the function,
The slope of a function is given by dy/dx, therefore,
dy/dx = -1/(x+6)²
Therefore, at point (0, 1/6),
The slope = -1/(0+6)² = -1/36
At point (-2, 1/4),
The slope = -1/(-2+6)² = -1/16
Hence the slope at the given points are -1/36 and -1/16 respectively.
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A large diamond with a mass of 2138. 7 grams was recently discovered in a mine. If
8
the density of the diamond is 3. 51 cm", what is the volume? Round your answer to
the nearest hundredth. (5 points)
O 1)
141. 84 cm3
2) 609. 3 cm3
3) 717. 06 cm3
O 4
8169. 8 cm3
WILL GIVE BRAINLIEST!!
The volume of the diamond is 609.3 cm³.
To find the volume of the diamond, we can use the formula:
Volume = Mass / Density
Given:
Mass = 2138.7 grams
Density = 3.51 g/cm³
Substituting these values into the formula:
Volume = 2138.7 g / 3.51 g/cm³
Calculating the division:
Volume ≈ 609.3 cm³
Therefore, the volume of the diamond is approximately 609.3 cm³.
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This ladder is extended to a length of 18 feet. The bottom of the ladder is 4. 5 feet from the base of the building. What angle does the ladder make with the ground?
The ladder makes an angle of approximately 82 degrees with the ground when it is extended to a length of 18 feet and the bottom of the ladder is 4.5 feet from the base of the building.
To determine the angle that the ladder makes with the ground, we can use trigonometry. Let x be the height of the ladder when it is leaned against the building. Then, using the Pythagorean theorem, we have: [tex]x^{2}[/tex] + [tex]4.5^{2}[/tex] = [tex]18^{2}[/tex]
Solving for x, we get: x = sqrt([tex]18^{2}[/tex] - [tex]4.5^{2}[/tex]), x ≈ 17.29
Therefore, the ladder makes an angle θ with the ground such that: sin θ = opposite/hypotenuse = x/18, θ = arcsin(x/18)
Substituting x ≈ 17.29, we get: θ ≈ 81.99 degrees
Therefore, the ladder makes an angle of approximately 82 degrees with the ground when it is extended to a length of 18 feet and the bottom of the ladder is 4.5 feet from the base of the building.
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