Step-by-step explanation: If we are finding the circumference of a circle, we're finding the distance around the circle. To find the circumference of a circle, we use a formula which is as followed.
[tex]C = 2\pi r[/tex] which means 2x the radius.
We can also represent this as followed.
[tex]C = D\pi[/tex] which means we will take our diameter which is 8 because if we multiply our radius which is 4 by 2, we get 8.
Therefore, our circumference is going to equal the diameter which ends up being 8 feet multiplied by pi.
Circumference = [tex]8\pi feet[/tex].
