\begin{tabular}{|l|l|}\hline 2. Eric needs to find the area of the base of a & 3. Wh \\ cylinder. Which formula should he use? & about \\ A. \( 2 \pi r \) & A. " \\ B. \( 2 \pi r h \) & B. " \\ C. \( \pi r^{2} \) & C. B \\ D. None of the above & D. \\ \hline\end{tabular}

To find the area of the base of a cylinder, Eric should use the formula for the area of a circle, which is \( \pi r^{2} \). This formula is derived from the fact that the base of a cylinder is a circular shape, where \( r \) is the radius. Remember, the area gives you the amount of space within the circle! When applying this formula, a common mistake is confusing the area with the circumference or volume. Ensure you use \( \pi r^{2} \) exclusively for area rather than mixing it up with formulas for other shapes or dimensions like \( 2 \pi r \) (which is the circumference) or \( 2 \pi r h \) (which represents the lateral surface area of the cylinder). Happy calculating!