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
131.88 mi.2
131.88 mi squared
1,384.74 mi.2
1,384.74 mi squared
346.19 mi.2
346.19 mi squared
65.94 mi.2
The correct formula to find the area of a circle is A = π * r^2, where r is the radius of the circle. Since the given measurement is the diameter, we need to divide it by 2 to find the radius.
Given that the diameter is 21 mi, the radius is 21 / 2 = 10.5 mi.
Plugging this value into the formula, we get:
A = 3.14 * (10.5)^2
A = 3.14 * 110.25
A = 346.185 mi^2
Rounded to the nearest hundredths place, the area of the circle is 346.19 mi^2.
Therefore, the correct response is: 346.19 mi.2