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
1,384.74 mi squared
346.19 mi.2
346.19 mi squared
131.88 mi.2
131.88 mi squared
65.94 mi.2
The correct formula to find the area of a circle is A = πr^2, where A represents the area and r represents the radius. In this case, the diameter is given, so we need to find the radius by dividing the diameter by 2.
Given:
Diameter = 21 mi
Radius = Diameter/2 = 21 mi/2 = 10.5 mi
Now substitute the value of the radius into the formula:
A = π(10.5 mi)^2
A ≈ 346.36 mi^2 (rounded to the nearest hundredths place)
Therefore, the correct answer is "346.19 mi.2".