Find the mean and standard deviation of the specified probability density function.f(x) = e-x for [0, ?)
A. ? = 1, ? = 1
B. ? = 0.5, ? = 1
C. ? = 0.5, ? = 0.5
D. ? = 10, ? = 10
Answer: A
Mathematics
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)2
A. 12 - 6
B. 12 + 6
C. 11 + 
D. 9 + 
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Solve the absolute value equation.|x - 8| = 6
A. x = 2, -14 B. x = 2, 14 C. x = -2, 14 D. x = 14
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Rationalize the denominator and simplify.
A. 1
B. 
C. 
D. 
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Write the word statement in symbols.Thirteen is greater than three plus nine.
A. 13 + 3 > 9 B. 3 + 9 > 13 C. 13 < 3 + 9 D. 13 > 3 + 9
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