Question

Find the length of the diameter of a sphere with a surface area of 804.25.
A. 12
B. 4
C. 8
D. 16

Answer 1

do we have a formula for surface area?

Answer 2

4 pi r^2

Answer 3

good, then if we rearrange that to get the "r" all by itself then we can determine the diameter of the sphere; since diam is twice r

Answer 4

Sa = 4pi r^2

Sa/4pi = r^2

sqrt(Sa/4pi) = r

2*sqrt(Sa/4pi) = 2*r = diameter

Answer 5

i believe thats about the sqrt of 225; so its a little bigger than 15

Answer 6

one question is a cone a sphere?

Answer 7

a cone is a cone; and a sphere is a sphere.

Answer 8

thanks