SOLUTION: Water covers 70.8%, or about 365×106 km2, of the earth's surface. Approximate the total surface area of the earth. (Round your answer to the nearest million.)

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Question 647807: Water covers 70.8%, or about 365×106 km2, of the earth's surface. Approximate the total surface area of the earth. (Round your answer to the nearest million.)
Answer by stanbon(75887) About Me  (Show Source):
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Water covers 70.8%, or about 365×106 km2, of the earth's surface. Approximate the total surface area of the earth. (Round your answer to the nearest million.)
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Let x be the total surface of the earth.
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Equation:
0.708x = 365x10^6
x = 5.155x10^8
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Cheers,
Stan H.