Given:
a.) The radius of a circle is 16 miles.
b.) Use 3.14 for π
For us to be able to determine the circumference of the circle using the radius, we will be using the following formula:
[tex]\text{ Circumference = 2\pi r}[/tex]Where,
r = radius of the circle
We get,
[tex]\text{ Circumference = 2\lparen3.14\rparen\lparen16\rparen = 100.48 miles}[/tex]Therefore, the circumference of the circle is 100.48 miles.