Find the volume of the solid formed when the region described is revolved about the x axis using washers and disks.
14) the region under the curve y= cubed root of x on the interval 0≤x≤8.
16) the region bounded by the lines x=0, x=1, y=x+1, and y=x+2.
20) the region bounded by the curves y=e^x and y=e^-x on [0,2]
The volumes of washers and disks are found.