#### Answer

radius = 2.5 ft
circumference = 5$\pi$ ft

#### Work Step by Step

The area of the circle = 6.25$\pi ft^{2}$
The area A of a circle whose radius has length r is given by
A = $\pi r^{2}$
6.25$\pi$ = $\pi r^{2}$
6.25 = $r^{2}$
r = 2.5 ft
We know the circumference of the circle is given by the formula
c= $\pi$ d = 2$\pi$ r = 2$\pi$ * 2.5 = 5$\pi$ ft