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math

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A circular lake is 30 miles across at its widest point. What is the area of the lake in acres? Round your answer to the nearest tenth of an acre.

  • math -

    A = pi * r^2

    A = 3.14 * 15^2

    A = 706.5 square miles

    1 square mile = 640 acres

    706.5 * 640 = ______ acres

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