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Harlamova29_29 [7]
3 years ago
15

Help me with this please it geometry

Mathematics
1 answer:
Goshia [24]3 years ago
7 0
They said start with x so x is 90° then the others can be 90° but may hav other angles
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You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim
pogonyaev

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36  

And rounded up we have that n=656

Step-by-step explanation:

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 80% of confidence, our significance level would be given by \alpha=1-0.80=0.20 and \alpha/2 =0.10. And the critical value would be given by:

z_{\alpha/2}=\pm 1.28

Solution to the problem

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)  

Since we don't have prior info for the proportion of interest we can use \hat p=0.5 as estimator. And on this case we have that ME =\pm 0.025 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)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36  

And rounded up we have that n=656

5 0
3 years ago
Find the fifth term in the sequence<br>that is defined as follows:<br>an = 2n​
Rainbow [258]

Answer:

a_{5}=10

Step-by-step explanation:

If you want to find the 5th term of a sequence or any term you have to substitute n for the desired term in your case the result is the following

a_{n}=2n\\a_{5}=2(5)\\a_{5}=10

7 0
3 years ago
What type of figure is this supposed to be?
kirill [66]
<span>Hexagonal pyramid. It has got 7 bases and 12 edges.</span>
4 0
3 years ago
There are 88 seats in a theater the seating in the theater is split into 4 identical sections. Each section has 14 red seats in
viktelen [127]
14 red 8 blue
88/4 =22
22-14 = 8
I think this if correct

3 0
2 years ago
4=6-2m <br> help me babes!
Radda [10]

Answer:

tbh idek bro good luck.... its 33

7 0
3 years ago
Read 2 more answers
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