3 years ago

Solve For X. Your answer must be simplified

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

4 0

X_>-42

sorry, i cant do the arrow thing on my keyboard, but it’s the same arrow in the picture

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Step-by-step explanation:

Given : The long-distance calls made by the employees of a company are normally distributed with a mean of 6.3 minutes and a standard deviation of 2.2 minutes

i.e. $\mu = 6.3$ minutes

$\sigma=2.2$ minutes

Let x be the long-distance call length.

a. The probability that a call lasts between 5 and 10 minutes will be :-

$P(5$

b. The probability that a call lasts more than 7 minutes. :

$P(X>7)=P(\dfrac{X-\mu}{\sigma}>\dfrac{7-6.3}{2.2})\\\\=P(Z>0.318)\ \ \ \ [z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Z$

c. The probability that a call lasts more than 4 minutes. :

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3 years ago

How long is ⅓ of 3 hours?

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2 years ago

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Edward has several missing assignments in his math class with a total of 274 problems to complete. His goal is to complete 4 pro

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Part a I am pretty sure it is a pattern so 4 plus 2 is 6, 6 plus 3 is nine and then 9 plus 4 is 13 Then 13 plus 5 is 18

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3 years ago

What is the following sum? <br> 3b^2(^3 √54a) + 3(^3 √2ab^6)

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