Answer:
1) 14π
2) 47.1
Explanation:
1)
Circumference = 2πr
where r = radius
given radius is 7mi
So we have C = 2πr and r = 7
==> plug in 7
C = 2π(7)
==> multiply 2 and 7
C = 14π
we leave our answer in terms of pi so this is our final answer.
2)
Again Cicumference = 2πr
The given radius here is 7.5
So C = 2πr
R = 7.5 and π = 3.14
==> plug in values
C = 2(3.14)(7.5)
==> multiply 2 and 3.14
C = 6.28(7.5)
==> multiply 6.28 and 7.5
C = 47.1