The circumference of the circle can be calculated as:
[tex]C=2\pi\cdot r[/tex]
If we have a radius of r=3, the circumference C is:
[tex]\begin{gathered} C=2\pi r \\ C=2\cdot3.14\cdot3 \\ C=18.84 \end{gathered}[/tex]
The circumference of the circle is 18.84 inches.
