If (x) and f(x) are inverse functions of each other and f(x) = 2x+5, what is f^-1(8)?
a.) -1
b.) 3/2
c.) 41/8
d.) 32

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis