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 n . (1 point)
• 346.19 mi.2
• 65.94 mi.2
• 1,384.74 mi.2
• 131.88 mi.2
The correct formula to find the area of a circle is A = πr^2, where π (pi) is approximately 3.14 and r is the radius.
First, calculate the radius using the given diameter:
r = d/2
r = 21 mi / 2
r = 10.5 mi
Now, substitute the radius into the formula to find the area:
A = 3.14 * (10.5)^2
A = 3.14 * 110.25
A = 346.185
Rounded to the nearest hundredth, the area of the circle is 346.19 mi^2.
Therefore, the correct answer is:
• 346.19 mi^2