Question

What is the volume of a sphere with a surface area of 9pi yd^2?

Answer 1

surface area of a sphere:
A=4pi*r^2
Volume:
V=4/3 pi*r^3
you know surface area - using to substitute known values in V

Answer 2

Surface Area of a Sphere = 4*pi*r^2
so 4*pi*r^2 = 9*pi
pi cancels
r^2 = 9/4
r = \[\sqrt{9/4}\]
r = 1.5 yd