Question

What is the volume of a sphere with a surface area of 9pi yd^2?
A) 9pi yd^3 B) 36pi yd^3 C) 9/2pi yd^3 D) 9/4pi yd^3

Answer 1

surface area = 4pi r^2 right?

Answer 2

volume = (4/3) pi r^3

Answer 3

9 pi = 4 pi r^2

9 = 4 r^2

r = 3/2 then correct?

Answer 4

\[Vol=\frac{4pi}{3}*(\frac{3}{2})^3\]

Answer 5

that comes to 4.5 pi if i dint mess it up