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Masja [62]
3 years ago
14

PLEASE HELP ASAP! WILL UPVOTE!

Mathematics
1 answer:
artcher [175]3 years ago
8 0
1.  equation A is multiplied by -2, yah, right form
turns to -2y=-30+4z
2. wrong, yo didn't distribute the -2 at all, it just dissaperaed, who taught that student how to do math?
after this, all steps are wrong because step 2 is wrong


error in step 2
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The Student Monitor surveys 1200 undergraduates from 100 colleges semiannually to understand trends among college students. Rece
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Answer:

A sample size of 385 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

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A sample size of n is needed. n is found when M = 1. So

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A sample size of 385 is needed.

7 0
3 years ago
What is the lateral area of the cylinder?
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<span>D = 22ft
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3 years ago
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