I need help with this question, with work please ANSWER ASAP!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

andriy [413]2 years ago

8 0

Answer:

5^12 or (244140625)

Step-by-step explanation:

I've always hated exponents but the way I visualize this is essentially taking 5^4 and multiplying it by itself 3 times (because it is put to the power of 3).

(5^4)·(5^4)·(5^4)

when you do this you can just add the exponents together

5^(4+4+4)

5^12

leva [86]2 years ago

4 0

Answer:

Step-by-step explanation:

multiply the exponent of 4 to exponent of 3, so its equal to 5^12 since this is law of a product of product. It says that SIMPLIFY so, you have to answer the 5^12 into simplest form which is 244,140,625

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A set of exam scores is normally distributed and has a mean of 80.2 and a standard deviation of 11. What is the probability that

ZanzabumX [31]

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:

$\mu = 80.2, \sigma = 11$