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1 October, 15:39

A spherical balloon is partially blown up and its surface area is measured. More air is then added, increasing the volume of the balloon. If the surface area of the balloon expands by a factor of 4.0 during this procedure, by what factor does the radius of the balloon change?

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  1. 1 October, 16:17
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    Factor of 2.

    Step-by-step explanation:

    The radius (one dimensional) scale factor is the square root of the surface area (2 dimensional) factor.

    √4.0 = 2.0.
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