# The radius of a circle is (7n-21) inches. How do you find the circumference of the circle in terms of n?

##### 1 Answer

Jan 3, 2017

#### Explanation:

To find the circumference of a circle, you use the formula of

To find the diameter of the circle, you would multiply the radius by 2.

2(7n-21) = 14n-42

Now, multiply by pi: