What is the circumference of a circle with a radius of 4?

To find the circumference of a circle, you can use the formula ( C = 2\pi r ), where ( C ) represents the circumference and ( r ) is the radius of the circle. In this case, the radius is given as 4.

Substituting that value into the formula gives:

[ C = 2\pi(4) = 8\pi ]

To find a numerical approximation, you can use ( \pi \approx 3.14 ):

[ C \approx 8 \times 3.14 = 25.12 ]

Therefore, the circumference of a circle with a radius of 4 is approximately 25.12. This matches the choice provided, indicating a correct understanding of how to apply the formula for circumference in the context of the problem.