Posted by **kyle** on Wednesday, July 9, 2014 at 10:33pm.

The radius of one sphere is twice as great as the radius of a second sphere.

Find the ratio of their surface areas.

- math -
**Steve**, Wednesday, July 9, 2014 at 10:37pm
4π(2r)^2 / 4πr^2 = 4

the square of the radius ratio

- math -
**kyle**, Wednesday, July 9, 2014 at 10:39pm
Find the surface area of an orange with a 3'' radius.

- math -
**Steve**, Wednesday, July 9, 2014 at 11:53pm
The formula is above. Plug in r=3.

We will assume a smooth, rather than a dimpled, surface :-)

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