Use the correct formula to find the area of a circle if the diameter is 21 miles round to the nearest hundredth place used 3.14 for
the value of pi.
Area = πr^2
Area = π(21/2)^2
Area = π(10.5)^2
Area = 3.14 * 110.25
Area ≈ 345.96
Therefore, the area of the circle is approximately 345.96 square miles.