Question

Find the radius of a sphere with a surface area of 804cm2 @iGreen

Answer 1

\(SA_{sphere} = 4 \pi r^2\)

Plug in what we know:

\(804 = 4(3.14) r^2\)

Multiply 4 * 3.14

Answer 2

12.56 @iGreen

Answer 3

Yes, so we have:

804 = 12.56r^2

Divide 12.56 to both sides, what's 804 / 12.56?

Answer 4

64 (rounded) @iGreen

Answer 5

Yes, so we have:

64 = r^2

Find the square root of both sides, what's the square root of 64?

Answer 6

8

Answer 7

yes

Answer 8

Thanks again! @iGreen

Answer 9

Yep, that's our answer.

Answer 10

thank you!