Use the correct formula to find the area of a circle if the diameter is 21 mi. Round to the nearest hundredths place. Use 3.14 for . (1 point)
The formula to find the area of a circle is A = πr^2, where r is the radius of the circle.
Since the diameter is given, we can first find the radius by dividing the diameter by 2:
r = 21 mi / 2 = 10.5 mi
Now we can plug in the radius into the formula and calculate the area:
A = 3.14 * (10.5)^2
A = 3.14 * 110.25
A = 346.185
Rounded to the nearest hundredths place, the area of the circle is 346.19 square miles.