Hector is deciding how much he should invest each year. The Automatic Method multiplies the average income by 10%, where the
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well, if the diameter is 5, thus its radius must be half that, or 2.5, and therefore, the radius of the one four times as much will be (4)(2.5).
Let's simply get their difference, since that'd be how much more is needed from the smaller to larger sphere.
check the picture below.
