How do I find the circumference of a circle with a radius of 5?

To find the circumference of a circle with a radius of 5, you can use the formula $C = 2\pi r$, where $C$ is the circumference and $r$ is the radius. By substituting the value of the radius, which is 5, into the formula, you get $C = 2\pi (5) = 10\pi$. If you're using this in the USA, you can use 3.14 as an approximation for $\pi$, so the circumference is approximately $10 \times 3.14 = 31.4$ units. Therefore, the circumference of a circle with a radius of 5 is 31.4 units.