By definition, the circumference of a circle is given by:
[tex]C = 2 \pi r[/tex]
Where,
r: radius of the circle.
We have then, that the radius of the outer circle is given by:
[tex]r = 15 + 3[/tex]
[tex]r = 18[/tex]
Then, replacing values we have:
[tex]C = 2 (3.14) (18)[/tex]
[tex]C = 113[/tex]
Answer:
The circumference of the outer edge of the frame is:
113 inches
option D
