Question #N1030
A circle has a radius of 5. What is the area of the circle? (Express your answer in terms of pi.)
A. 5\pi
B. 10\pi
C. 25\pi
D. 100\pi
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Correct Answer is: C
The area of a circle is given by the formula $A = \pi r^2$, where $r$ is the radius. Substituting 5 for $r$ gives $A = \pi (5)^2 = 25\pi$.