An object is moving with constant speed in a circular path. The object's centripetal acceleration.

SAT

1 answer:

Rus_ich [418]2 years ago

7 0

Answer:

The object' s centripetal acceleration is always directed toward the center of the circle, perpendicular to the object's velocity at any one time.

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The distribution of number of hours worked by volunteers last year at a large hospital is approximately normal with mean 80 and

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Explanation:

Using the normal distribution, it is found that the probability that the volunteer selected will receive a certificate of merit given that the number of hours the volunteer worked is less than 90 is closest to:

B 0.123

In a normal distribution with mean \muμ and standard deviation \sigmaσ , the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}Z=σX−μ

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The standard deviation is of 7, hence \sigma = 7σ=7 .

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Z = \frac{X - \mu}{\sigma}Z=σX−μ

Z = \frac{90 - 80}{7}Z=790−80

Z = 1.43Z=1.43

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