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OpenStudy (anonymous):
How would you estimate the surface area of our earth?
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OpenStudy (aum):
Surface area of a sphere = \(\Large 4*\pi * r^2\) where r is the radius of the earth. Plug the value for earth's radius.
OpenStudy (mathstudent55):
Look up the average radius of the earth. Then use the formula for the surface area of a sphere.
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