A circle measures 8 feet in diameter. What's its area to the nearest foot?

The area of a circle equals π times the radius squared. The radius is one-half the diameter. \(A=\pi r^{2}; A=\pi(8 \div 2)^{2}=\pi 4^{2}=\pi 16\). \(\pi\) is approximately 3.14 so the area of the circle to the nearest foot is approximately 3.14 * 16 or 50 feet (round down for decimals .49 and smaller and round up for decimals 0.50 and greater).