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 21 mi, the radius would be half of that, which is 10.5 mi.
Now, plug in the values 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 squared.
Therefore, the correct answer 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 .
1,384.74 mi squared
65.94 mi squared
131.88 mi squared
346.19 mi squared
1 answer