Find the indefinite integral.
A. - 12 cos 4x + C
B. - 
cos 4x + C
C. 3 cos 4x + C
D. 
cos 4x + C
Answer: B
Mathematics
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Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500
Mathematics
Add. Write a mixed numeral for the answer.8
7
A. 16
B. 16
C. 17
D. 15
Mathematics
For problems 1-12, use the zero product property to solve each equation.
A. 
B. 
C. 
D. 
E. no solution
Mathematics
Solve the problem.At a pencil factory, the average worker produces 72 pencils per day, with a standard deviation of 8 pencils per day. If one worker produces 63 pencils, what is the z-score for his number of pencils produced?
A. -1.125 B. 0.764 C. -0.889 D. -0.764
Mathematics