If p/q=q/r then prove that p3+q3+r3=(1/p3+1/q3+1/r3)p2q2r2

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.