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
1,384.74 mi.2
65.94 mi.2
346.19 mi.2
131.88 mi.2
The correct formula to find the area of a circle is A = πr^2, where r is the radius of the circle.
Given that the diameter is 21 mi, the radius (r) is half of the diameter, so r = 21 / 2 = 10.5 mi.
Plugging in the values, we get:
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.
Therefore, the correct answer is:
346.19 mi^2