The radius of a circle is 2 inches. When the radius is doubled, by how many square inches is the area increased? Express your answer in terms of $\pi$.
\(a=\pi r^2\)
\(a=\pi2^2\)
\(a=4\pi\)
\(a=\pi4^2\)
\(a=16\pi\)
\(16\pi-4\pi=12\pi\)
The difference is \(12\pi\)
Hope this helps!!!
-Ako
yes it does help thank u
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