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amid [387]
3 years ago
10

Determine the final price of a jacket that originally costs $50 and is on sale for 30% off.

Mathematics
2 answers:
german3 years ago
8 0
I belive it would be 35$
icang [17]3 years ago
7 0
=50-(50*30%)
=50-(50*0.30)
=50-15
=$35
the new cost would be $35
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A grading scale is set up for 1000 students' test scores. It assumes the
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Answer:

464 students will score between 48 and 75. Using the z-distribution, we measure how many standard deviations each score is from the mean, then find the p-value associated with each score to find the proportion, and from the proportion, we find how many out of 1000.

Step-by-step explanation:

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Problems of normal distributions can be solved using the z-score formula.

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It assumes the scores are normally distributed with a mean score of 75 and a standard deviation of 15.

This means that \mu = 75, \sigma = 15

How many students will score between 48 and 75?

First we find the proportion, which is the pvalue of Z when X = 75 subtracted by the pvalue of Z when X = 48. So

X = 75

Z = \frac{X - \mu}{\sigma}

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0.4641*1000 = 464

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