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Kay [80]
3 years ago
10

Arnold rides the subway 20 times a month to work for $2.50 a day a monthly pass cost $45.25. How much could he save by buying th

e pass?
Mathematics
2 answers:
ozzi3 years ago
7 0

Answer:

He would save $4.75.

Step-by-step explanation:

Without the pass,

In a month, Arnold has to spend: $2.50 x 20 = $50

With the pass,

In a month, Arnold has to spend: $45.25

So, Arnold may save: $50 - $45.25 = $4.75 if he has a monthly pass.

bagirrra123 [75]3 years ago
6 0
4.75$

you have to multiply the daily amount by the times a month he rides it and then subtract it by 45.25
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Answer:

93.32% probability that a randomly selected score will be greater than 63.7.

Step-by-step explanation:

Problems of normally distributed samples are solved using 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.

In this problem, we have that:

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What is the probability that a randomly selected score will be greater than 63.7.

This is 1 subtracted by the pvalue of Z when X = 63.7. So

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Step-by-step explanation:

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