\"\"

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Given that radius of a sphere(r) = 13 inches.

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Volume(V):

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\"\"                     (Volume of a sphere)

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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 the sphere is approximately 9198 cubic inches.