Answer
Circumference: 122.46 ft
Area: 1193.98 ft$^{2}$
Work Step by Step
Circumference of a Circle: $C$ = $\pi$$d$
Therefore:
$C$ = (3.14)(39 ft)
$C$ = 122.46 ft
Area of a Circle: $A$ = $\pi$$d$$^{2}$/4
Therefore :
$A$ = (3.14)(39 ft)$^{2}$/4
$A$ = 1193.98 ft$^{2}$