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 $\pi$.
Question:
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 $\pi$.
Answer:
Let's think step by step.

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12\pi
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 $\pi$.
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