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 π .(1 point) Responses
A.1,384.74 mi squared
B. 65.94 mi squared
C. 31.88 mi squared
D. 346.19 mi squared
A. 1,384.74 mi squared
The formula to find the area of a circle is A = πr^2 where r is the radius. Since the diameter is given, we first need to find the radius by dividing the diameter by 2:
Radius = diameter/2
Radius = 21 mi / 2
Radius = 10.5 mi
Now, substitute 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 346.19 mi squared.