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3 years ago

7

What is the answer to -3/4 (2)(-6) in fraction form

1 answer:

nasty-shy [4]3 years ago

4 0

I'm assuming the question looks like this?

$\frac{-3}{4} (2)(-6)$

If so then the answer should be:

$\frac{-3}{4} (2)(-6)=\frac{-3}{4} (-12)=9$

Hope this helps!

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Answer:

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Step-by-step explanation:

We have been given that the time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. We are asked to find the probability of completing the exam in one hour or less.

We know that 1 hour equals 60 minutes. First of all, we will find the z-score corresponding to 60 minutes.

$z=\frac{x-\mu}{\sigma}$

z = z-score,

x = Sample score,

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$\sigma$ = Standard deviation.

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$z=\frac{-20}{10}$

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Now, we will use normal distribution table to find area under z-score of $-2$ as:

$P(z< -2)$

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Therefore, the probability of completing the exam in one hour or less is 0.02275.

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