Remember that the formula for the circumference of a circle is:
[tex]C=2\pi r[/tex]Since the diameter is twice the radius,
[tex]6.2\div2=3.1[/tex]Our cirlce has a radius of 3.1".
Using this and the data given, we get that:
[tex]\begin{gathered} C=2(3.14)(3.1) \\ C=19.468 \end{gathered}[/tex]Therefore, the circumference would be 19.468 inches