Koko

Mathematics

14 June, 01:19

11. A cylinder has a radius of 2x + 3 and a height of 6x + 1. which polynomial in standard form best describes the total volume of the cylinder? use the formula V = (Pie) r^2h for the volue of a cylinder.

A. 12 (Pie) x^2+20 (pie) x+3 (pie)

B. 24 (pie) x^3+76 (pie) x^2+66 (pie) x+9 (pie)

C. 144 (pie) x^4+480 (pie) x^3+427 (pie) x^2+120 (pie) x+9 (pie)

D. 72 (pie) x^3+132 (pie) x^2+38 (pie) x+3 (pie)

12. A sphere has a radius of 2x+5. which polynomial in standard form best describes the total surface area of the sphere? use the formula S=4 (pie) r^2 for the surface area of a sphere.

A. 16 (pie) x^2+80 (pie) x + 100 (pie)

B. 16 (pie) x^2+40 (pie) x+100 (pie)

C. 100 (pie) x^2+80 (pie) x+16 (pie)

D. 100 (pie) x^2+100 (pie)