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OpenStudy (anonymous):
The surface area of a sphere is given by the formula 4pir^2, where r is its radius. Although the shape of earth is not exactly spherical, it has an average radius of 3960 miles. Estimate the surface area of earth?
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OpenStudy (anonymous):
substitute r = 3960 in the formula.
OpenStudy (anonymous):
note that the surface area will be in square miles
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
you're welcome.
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