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
65.94 mi.2
65.94 mi squared
131.88 mi.2
131.88 mi squared
1,384.74 mi.2
1,384.74 mi squared
346.19 mi.2
The correct formula to find the area of a circle is A = πr^2, where r is the radius of the circle (which is half the diameter).
Given the diameter is 21 mi, the radius would be 21/2 = 10.5 mi.
Now, 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 mi^2.
So, the correct answer is: 346.19 mi.2 or 346.19 mi squared.