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
65.94 mi.2
65.94 mi squared
1,384.74 mi.2
1,384.74 mi squared
131.88 mi.2
The correct formula to find the area of a circle is A = π*(r^2), where A represents the area and r represents the radius.
Given that the diameter is 21 miles, we can determine the radius by dividing the diameter by 2:
r = 21 mi / 2 = 10.5 mi
Now, we can substitute the value of the radius into the formula:
A = 3.14 * (10.5 mi)^2
A ≈ 346.19 mi²
Therefore, the correct answer is:
346.19 mi.²