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(p ie)
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)