Use the correct formula to find the area of a circle if diameter is 21 mi. Round to the nearest hundredths place. Use 3.14 for pi
To find the area of a circle, you use the formula A = πr^2, where r is the radius of the circle. The radius is half the diameter, so in this case, the radius is 21 mi / 2 = 10.5 mi.
Now plug in the radius into the formula:
A = 3.14 x (10.5)^2
A = 3.14 x 110.25
A = 346.185
Rounded to the nearest hundredths place, the area of the circle is approximately 346.19 square miles.