Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by 
for x in 
Find the probability of rainfall less than two standard deviations below the mean.
A. 0
B. 0.026
C. 0.037
D. 0.031
Answer: C
Mathematics
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Find the product.(9 + x)(3x + 7)
A. x2 + 34x + 34 B. 3x2 + 33x + 63 C. 3x2 + 34x + 63 D. 3x2 + 63x + 34
Mathematics
Solve the given differential equation. (The form of yp is given.)D2y + 3Dy - 10y = 30 (Let yp = A.)
A. y = c1e2x + c2e-5x + 3 B. y = c1e2x + c2e-5x C. y = c1e2x + c2e-5x - 3 D. y = c1e-2x + c2e5x - 3
Mathematics
Express the solution set of the inequality in interval notation.x < 6
A. (-?, 6) B. (-?, 6] C. (6, ?) D. [6, ?)
Mathematics
Solve the problem.The polynomial 
measures the concentration of a dye in the bloodstream x seconds after it is injected. Does the concentration increase between 12 and 13 seconds?
A. No B. Yes
Mathematics