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Nataly [62]
3 years ago
5

Decide whether the expression has been simplified correctly.

Mathematics
1 answer:
Alexeev081 [22]3 years ago
6 0

Answer:

No.

Step-by-step explanation:

According to the law of exponent:-

\displaystyle \large{( \frac{a}{b}) ^{m}   =  \frac{ {a}^{m} }{ {b}^{m} }  }

Therefore:-

\displaystyle \large{( \frac{a}{4} )^{5} =  \frac{ {a}^{5} }{ {4}^{5} }  }

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Multiply by 4 on both sides to isolate the variable M. 28*4 = 112. 

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Step-by-step explanation:

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A large sample of tires from cabs driven within a city have an average tire tread depth of 0.25cm at the end of the winter. If t
frutty [35]

Answer:

0% probability cab tires depths would be shallower than 0.25cm.

Step-by-step explanation:

Problems of normally distributed samples can be 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:

\mu = 2.2, \sigma = 0.33

What is the probability cab tires depths would be shallower than 0.25cm.

This probability is the pvalue of Z when X = 0.25. So

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

Z = \frac{0.25 - 2.2}{0.33}

Z = -5.9

Z = -5.9 has a pvalue of 0.

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Answer:

Step-by-step explanation:

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