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Lana71 [14]
3 years ago
12

Reggie read a 400-page book in 5 days. On the first day, he read 120 pages.

Mathematics
1 answer:
Zepler [3.9K]3 years ago
8 0

Answer:

Step-by-step explanation:

Let p represent the number of pages that she read on each day after the first day.

Reggie read a 400-page book in 5 days. On the first day, he read 120 pages. The means that the remaining number of pages would be 400 - 120 = 280

The number of days remaining would be 5 - 1 = 4

Since she read the same number of pages on each day after the first day, then

4p = 280

p = 280/4 = 70 pages

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Triss [41]

Answer:

Longer than 27.7 minutes.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

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3 years ago
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Did you mean :

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