GEOMETRY The area of the circle is$\mathbf{36}\mathbf{\pi }$ square units. If the radius is doubled, what is the area of the new circle?

$$\begin{gathered} \mathbf{F}\mathbf{}\mathbf{72}\mathbf{\pi }\mathbf{}{\mathbf{units}}^2 \\ \mathbf{G}\mathbf{}\mathbf{144}\mathbf{\pi }\mathbf{}{\mathbf{units}}^2 \\ \mathbf{H}\mathbf{}\mathbf{1296}\mathbf{\pi }\mathbf{}{\mathbf{units}}^2 \\ \mathbf{J}\mathbf{}\mathbf{9}\mathbf{\pi }\mathbf{}{\mathbf{units}}^2 \end{gathered}$$

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