A company installs 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last the indicated amount of time.Less than 200 hours

A. 7
B. 4,444
C. 5
D. 10


Answer: C

Mathematics

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Evaluate the integral.

A. - cot38x + cot 8x + C
B. - cot38x + cot 8x + x + C
C. - cot38x + cot 8x + x + C
D. - cot38x + cot2 8x + x + C

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Solve the problem.Six people from different occupations were interviewed for a survey, and their annual salaries were as  and  What is the mean annual salary for the six people?

Fill in the blank(s) with the appropriate word(s).

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Find the root if it is a real number.

A. 10 B. -2 C. -10 D. 2

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Approximate using a Reimann sum with n = 4 .

What will be an ideal response?

Mathematics