Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by  for x in  Find the mean annual rainfall.

A. 3.000
B. 3.360
C. 2.994
D. 3.194


Answer: D

Mathematics

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Solve the problem.Find the radius of gyration about the x-axis of a lamina in the first quadrant bounded by the coordinate axes and the curve  if .

A.  = 
B.  = 
C.  = 
D.  = 

Mathematics

Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation. +  +  + . . . + 

A.
B.
C.
D.

Mathematics

Provide an appropriate response.Solve the system of equations using the addition method: 4x - y = 9 -x + y = -3

A. x = -1, y = 2 B. x = 2, y = -1 C. x = -1, y = -5 D. x = 5, y = 2

Mathematics

Solve the system by the method of substitution. ? ? ?

A.
B. (1, 3)
C.
D.
E. (-1, 3)

Mathematics