Answer:
4 miles
Step-by-step explanation:
The diameter is twice the radius, or
d=2r
We know the diameter is 8, so we can substitute that in for d
8=2r
Since we want to solve for, r, we need to get r by itself. To do that, divide both sides by 2
8/2=2r/r
4=r
So, the radius is 4 miles
