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
346.19 mi.2
346.19 mi squared
131.88 mi.2
131.88 mi squared
65.94 mi.2
65.94 mi squared
1,384.74 mi.2
1,384.74 mi squared
The correct formula to find the area of a circle is A = πr^2, where r is the radius of the circle. Since the diameter is given (21 mi), we first need to find the radius by dividing the diameter by 2.
Radius = 21 mi / 2 = 10.5 mi
Now, substitute the radius 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.
Therefore, the correct response is:
346.19 mi squared