Question

Can someone please help me on number 19

Answer 1

Answer:

$12\pi x^{2} +21\pi x+9\pi$

Step-by-step explanation:

$V=Bh=\pi r^{2} h = \pi (4x+3)^{2} (3x+3) = \pi (12x^{2}+12x+9x+9 )=12\pi x^{2} +21\pi x+9\pi$