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DanielleElmas [232]
3 years ago
14

Complete the table of equivalent ratios. 3 5 10 9 20 25

Mathematics
1 answer:
RUDIKE [14]3 years ago
7 0

Answer:

Step-by-step explanation:

The first is 2, the second is 6 and the third is 14.

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Sean places 28 tomato plants in rows. All rows contain the same number of plants. What Is a number to plants in each row
Maslowich
There are many different combinations you can make.
. 2 rows with 14 tomatoes each
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. 14 rows with 2 toatoes each
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3 years ago
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A university planner wants to determine the proportion of spring semester students who will attend summer school. Suppose the un
ss7ja [257]

Answer:

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

Since we don't have prior estimation for the population proportion we can use the value \hat p =0.5. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.112}{1.64})^2}=53.60  

And rounded up we have that n=54

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.005. And the critical value would be given by:

z_{\alpha/2}=-1.64, z_{1-\alpha/2}=1.64

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.112 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

Since we don't have prior estimation for the population proportion we can use the value \hat p =0.5. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.112}{1.64})^2}=53.60  

And rounded up we have that n=54

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2 years ago
What is the retail price of the couch?
BabaBlast [244]

Answer:

You would multiply the $115 by 1.75 to get $201.25 for the retail price

Step-by-step explanation:

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3 years ago
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An Equation using t = 5
arlik [135]
2t+2=12
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What is the equation of the line that contains the points (2,6) and (-2,4)
suter [353]

Answer:

y =1 /2 x+ 5

Step-by-step explanation:

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