Question

How do you find the radius if the surface area is 16π in.² ?

Answer 1

what 3D object is it?

Answer 2

A sphere

Answer 3

Surface area of sphere
\[\Large SA = 4\pi*r^2\]

Answer 4

use that formula to replace the SA (surface area) with 16pi

then solve for r. Tell me what you get when you isolate r

Answer 5

I got 4?

Answer 6

you should get r^2 = 4, so r = ???

Answer 7

2

Answer 8

yes

Answer 9

so the radius is 2

Answer 10

2 inches

Answer 11

Thank you so much! I was confusing myself!

Answer 12

you're welcome