What is the circumference of a circle with a radius of 7?

The circumference of a circle can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius of the circle. In this case, the radius is given as 7.

Substituting the radius into the formula gives:

[ C = 2\pi(7) = 14\pi ]

This shows that the circumference of the circle is represented as ( 14\pi ). This form is often preferred in mathematics as it maintains the value in terms of π, which is an irrational number and provides a more precise measurement of the circumference without rounding off decimals.

While other options provide different values, they do not follow the mathematical procedure to arrive at the precise circumference based on the given radius. The value of ( 14\pi ) conveys the exact relationship between the radius and the circumference clearly and accurately.