The circumference of a circle is 3 pi miles. What is the diameter?

3 miles

Step-by-step explanation:

The circumference of a circle can be found using:

c=

We know the circumference is , so we can substitute that in for c

=

We want to find the diameter. To do this, we need to get d by itself. It is being multiplied by pi. To undo this, divide both sides by pi. This will cancel pi, and leave d by itself.

3=d

So, the diameter is 3 miles

Diameter is 3

Step-by-step explanation:

C=2πr

3π = 2πr

3π / 2π = r  (Divide each side by 2π)

3/2 = r   (Simplify π)

3/2 *2 = d  (d = 2r)

d = 6/2 = 3

8

step-by-step explanation: