Which expression is equivalent to 5y^-3? 1/125^3 1/5y^3 5/y^3 125/y^3

1 answer:

6 0

So remember the rule from negative exponents to fractions is: $x^{-m}=\frac{1}{x^m}$ . Note that it is only the y exponent with the negative exponent, not 5, so our fraction would look like this: $\frac{5}{y^3}$ .

In short, the correct answer is the third option: 5/y^3.

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The College Student Journal (December 1992) investigated differences in traditional and nontraditional students, where nontradit

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Answer:

There is a 0.13% probability that the random sample of 100 nontraditional students have a mean GPA greater than 3.65.

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

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

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. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

For this problem, we have that:

Based on the study results, we can assume the population mean and standard deviation for the GPA of nontraditional students is $\mu = 3.5$ and $\sigma = 0.5$ .