3 years ago

ANSWER FOR MARK AS BRAINLIEST!!! Please explain step by step on how to answer this math problem

1 answer:

7 0

Divide 63 by 3 to get 21, price of 1 shirt.
Divide 21 by 7 to get 3, 10% of the original price.
Multiply 3 by 10 to get 30, the original price.
$30
Hope this helps

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How do change 13 1/4 into decimal form

Bess [88]

That would be 13.25, 13+1/4
= 13+(1 divided by 4 which is 0.25)
= 13+0.25
Which is 13.25 so your answer is 13.25, good luck hope that helps :D

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3 years ago

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mario62 [17]

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2 years ago

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levacccp [35]

Answer:

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Step-by-step explanation:

We have that for 95% of confident, the value of z has a value of 1.96 (attached table about it), they also mention the margin of error (E) that is 10 and finally the standard deviation (sd) that has a value of 221.

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replacing:

n = [1.96 * 221/10] ^ 2

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that is, the minimum sample size is 1877

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geniusboy [140]

Answer:

Step-by-step explanation:

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