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Find the value of Sinx / COS X when x = 30°

Mathematics

1 answer:

maksim [4K]3 years ago

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Answer:

$\frac{\sqrt{3}}{3}$

Step-by-step explanation:

You evaluate the the expression.

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A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 77 and a standar

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Answer:

0.9007 is the probability that a student scored below 86 on this exam.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 77

Standard Deviation, σ = 7

We are given that the distribution of examination grades is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(student scored below 86)

P(x < 86)

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