# Algebra 1

Earth has a radius of about 6.4 x 10 to the 6th power m. Approximate the surface area of earth using the formula for the surface area is a sphere, S = 4 pi r squared. Earths surface is about 70 percent water. About how many square meters of earths surface are covered with water? The oceans have an average depth of 3795 m. Estimate the volume of water on earth.

1. water is 0.70 * 4*pi*(6.4*10^6)^2

for volume, multiply that by the depth.

posted by Steve

a. What is the approximate surface area of the earth? Use the formula S A space equals space 4 πr squared and use 3.14 for pi.

posted by carson

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