The correct formula to find the area of a circle is A = πr^2, where r is the radius of the circle.
To find the radius, you divide the diameter by 2: r = 21 mi / 2 = 10.5 mi.
Substituting the value of the radius into the formula:
A = 3.14 * (10.5 mi)^2 = 346.185 mi^2.
Rounding to the nearest hundredths place, the area of the circle is approximately 346.19 mi^2.
Therefore, the correct response is:
346.19 mi squared.
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
346.19 mi.2
346.19 mi squared
65.94 mi.2
65.94 mi squared
1,384.74 mi.2
1 answer