Question

Can you pretty please help me with my Surface Area question?

Answer 1

okay so we have to wwork backwards from the surface area equation.

Answer 2

Suface area = 4 pi r^2

Answer 3

okay so plug in the surface area and solve for r

Answer 4

nvrmind

Answer 5

remember that 2r = d

Answer 6

I did that & got the wrong answer.

Answer 7

did you double r to get d?

Answer 8

Yes I did. I got 3.5

Answer 9

okay so
\[490.87 = 4 pi ( r ^2) \]
\[490.87/4 pi = r ^2\]
\[\sqrt(490.87/4pi) = r\]

Answer 10

\[2r = d\]
so
\[d = 2\sqrt(490.87/4pi)\]

Answer 11

This is what I did.