\"\"

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Given that radius of a hemisphere(r) = 5.2 miles.

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Volume(V):

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\"\"                 (Volume of a hemisphere)

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\"\"        (Substitute \"\")

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\"\"     (Evaluate powers)

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\"\"           (Multiply)

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\"\"                          (Simplify)

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\"\"                (Substitute \"\")

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\"\"                          (Multiply)\"\"

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The volume of a hemisphere is approximately 294.3 cubic miles.