Question #N302
A circle has a radius of 5 units. What is the circumference of the circle in terms of $\pi$?
A. $\pi$
B. $5\pi$
C. $10\pi$
D. $25\pi$
Correct Answer is: C
The circumference of a circle is given by the formula $C = 2\pi r$, where $r$ is the radius. Substituting 5 for $r$ gives $C = 2\pi(5) = 10\pi$.