Question

The volume of a cylinder is given by the formula mc021-1.jpg, where r is the radius of the cylinder and h is the height. Which expression represents the volume of this cylinder? r=x-3 h=2x+7

Answer 1

The volume of a cylinder is given by πr²h
r= x-3, while h =2x+7
Thus; volume = π(x-3)²(2x+7)
                       =π(x²-6x+9)(2x+7)
                       =π( 2x³-12x²+18x +7x²-42x+63
                       = π(2x³-5x²+24x+63) cubic units

Answer 2

3(pi)x^3+20(pi)x^2+44(pi)x+32(pi)

The fourth answer choice.