Quia California Pest Control Applicator Practice Test

Area of a circle is found with A = πr^2. The radius is half the diameter, so here r = 20/2 = 10 feet. Plugging in gives A = π × 10^2 = 100π. Using π ≈ 3.14, the area is about 100 × 3.14 = 314 square feet. So the approximate area is 314 square feet. The other numbers are not close because they are roughly half, double, or much smaller than the true value.