Asked by Lauren

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.
Answered by Steve
water is 0.70 * 4*pi*(6.4*10^6)^2

for volume, multiply that by the depth.
Answered by carson
Earth has a radius of about 6.4 x 106 m. Show your work and write your answer in scientific notation.

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.
Answered by patama
I need someone show me how to work and get the right answer please
Answered by Anonymous
2. Earth has a radius of about 6.4 x 106 m. Use scientific notation to show the calculations and final answers.

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.

SA = (4)(3.14)(6.4 x 106 m)2 SA ≈ 5.14 x 1014 m2

b. Oceans cover about 70% of the surface of the Earth. About how many square meters of Earth's surface are covered by ocean water?

= (.70) (4)(3.14)(6.4 x 106 m)2

= 40232.192 x 1012
≈ 4.0232192 x( 1012 • 104)
≈ 4.02 x 1016
About 4.02 x 1016 m2 of Earth's surface are covered by ocean water
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