Question: A spherical float has a volume of air within it of radius r1,and the outer radius of the float is r2. Express in factored form

A spherical float has a volume of air within it of radius r1,and the outer radius of the float is r2.

Express in factored form the difference in areas of the outer surface and the inner surface.

The difference in area is ___ ?

What is the in answer in factored form.

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