Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by 
for x in 
Find the standard deviation.
A. 1.270
B. 1.265
C. 0.903
D. 1.597
Answer: B
Mathematics
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Evaluate the expression according to the replacement value given.5x + 4y; replace x with 7 and y with 6.
A. 63 B. 59 C. 54 D. 58
Mathematics
Use integration by parts to establish a reduction formula for the integral.
A. 
= - cosn-1 x sin x + (n - 1) 
B. 
= 
cosn-1 x sin x + 
C. 
= cosn-1 x sin x - (n - 1) 
D. 
= 
cosn-1 x sin x - 
Mathematics
Provide an appropriate response.A markup based on cost is generally used by retailers.
A. True B. False
Mathematics
Find the future value of the annuity due. Round to the nearest cent.$200 deposited at the beginning of each quarter for 9 years at 8% compounded quarterly
A. $10,606.85 B. $10,198.87 C. $9798.90 D. $2697.31
Mathematics