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.
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
1 answer