math
posted by tiffany .
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?

Surface Area = 4 * pi * r^2
A = 4 * 3.14 * 6,365^2
A = 508,846,106
0.34 * 508,846,106 = ? 
thankyou soooo much ms.sue

You're very welcome, Tiffany.

where did you get the 0.34 from?

The world is made up of land and earth. If there is 66% water then there can only be 34% land (whats left). 66% water plus 34% land = 100% of what makes up the earth.
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