Homework Help: math

Posted by tiffany on Tuesday, July 24, 2012 at 12:36pm.

The earth is approx. a sphere. Its diameter is about 12 730 km. Water covers approx. 66 percent of the earths surface. How many square kilometres of land covers the earth?

math - Ms. Sue, Tuesday, July 24, 2012 at 12:43pm
Surface Area = 4 * pi * r^2

A = 4 * 3.14 * 6,365^2

A = 508,846,106

0.34 * 508,846,106 = ?
math - tiffany, Tuesday, July 24, 2012 at 4:13pm
thank-you soooo much ms.sue
math - Ms. Sue, Tuesday, July 24, 2012 at 4:23pm
You're very welcome, Tiffany.
math - dee, Thursday, August 30, 2012 at 2:53pm
where did you get the 0.34 from?

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