Given a circle with a circumference of 10 feet-
The radius is around 1.59 ft.
You can use formulas of the circle to solve for the radius.
Hope this helps!
[tex] \bf \textit{circumference of a circle}\\\\
C=2\pi r~~
\begin{cases}
r=radius\\
-----\\
C=10
\end{cases}\implies 10=2\pi r\implies \cfrac{10}{2\pi }=r\implies \cfrac{5}{\pi }=r [/tex]