11. A cylinder has a radius of 4x + 2 and a height of 5x + 4. Which polynomial in standard form best describes the total volume of the cylinder? Use the formula V = r2h for the volume of a cylinder.
(1 point)
80×3 + 144×2 + 84x + 16
80×3 – 144×2 + 84x + 16
80×3 + 144×2 + 84x – 16
80×3 + 144×2 – 84x + 16
12. A sphere has a radius of 4x + 4. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4r2 for the surface area of a sphere.
(1 point)
64×2 + 128x + 64
64×2 – 128x + 64
64×2 + 128x – 64
64×2 – 128x – 64
1 Answer

11. (4x + 2)^2 (5x + 4) =
80×3 + 144×2 + 84x + 16
12. 4 (4x + 4)^2 =
64×2 + 128x + 64