Given:
a.) A circle with a radius of 3 inches long.
To be able to get the circumference of the circle, we will be using the following formula:
[tex]\text{ C = 2}\pi r[/tex]Where,
C = Circumference
r = radius
We get,
[tex]\begin{gathered} \text{ C = 2}\pi r \\ \text{ = 2(3.14)(3)} \\ \text{ = 6 x 3.14} \end{gathered}[/tex][tex]\text{ C = 18.84 in.}[/tex]Therefore, the circumference of the circle is 18.84 in.