SOLUTION: how do i find the approximate radius of a sphere with a surface area of 40 pie square feet?

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how do i find the approximate radius of a sphere with a surface area of 40 pie square feet?
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SA = 4(pi)r^2
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40(pi) = 4(pi)r^2
10 = r^2
radius = sqrt(10) = 3.1623 ft.
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Cheers,
Stan Hanson
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