#### Answer

Area = $9\pi \approx 28.27433$ square feet
Circumference = $9\pi \approx 28.27433$ feet

#### Work Step by Step

RECALL:
(1) The area $A$ of a circle is given by the formula $A=\pi{(\frac{d}{2})^2}$ where $d$ = diameter
(2) The circumference $C$ of a circle is given by the formula $C=\pi{d}$ where $d$ = diameter.
Use the formula in (1) above to obtain the area of the circle:
$A=\pi(\frac{6}{2})^2
\\A=\pi(3^2)
\\A=\pi(9)
\\A=9\pi \approx 28.27433$
Thus, the area of the circle is $9\pi$ or approximately $28.27433$ square feet,
Use the formula in (2) above to obtain the circumference of the circle:
$C=\pi{d}
\\C=\pi(9)
\\C=9\pi$
Thus, the circumference of the circle is $9\pi$ or approximately $28.27433$ feet.