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
346.19 mi. squared
65.94 mi. squared
131.88 mi. squared
The correct formula to find the area of a circle is A = πr^2, where r is the radius of the circle.
Given that the diameter is 21 mi, the radius would be half of that, which is 10.5 mi.
Now, substitute the radius into the formula to get:
A = 3.14 * (10.5)^2
A = 3.14 * 110.25
A = 346.185 (rounded to the nearest hundredth)
Therefore, the area of the circle is approximately 346.19 mi^2.
So, the correct answer is:
346.19 mi. squared