A PDF for a continuous random variable X is given. Use the PDF to find E(X).f(x) = 

A. 8.28
B.
C.
D.

Answer: B

Mathematics

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Find the area of the shaded region.

A. 5 B. 10 C. 7.5 D. 12.5

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Evaluate the double integral.

A. (1 - cos 81)
B.  cos 81
C.  cos 81
D. (1 - cos 81)

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Simplify.

A. 1
B.
C. 0
D. -1

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Mathematics

Solve. +  = 0

A. - 
B.
C. - 
D.

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Mathematics