use the correct formula to find the the area of a circle that has a diameter of 21? Use 3.14 for pi and round your answer to the nearest hundreths place.\
A. 1,384.74 mi2
B. 131.88 mi2
C. 346.19 mi2
D. 64.94mi2
C. 346.19 mi2
The formula to find the area of a circle is A = πr^2, where r is the radius. Since the diameter is given, we can find the radius by dividing the diameter by 2:
r = 21 / 2
r = 10.5
Now we can plug in the values into the formula:
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 mi2.