To find the area of a circle, you can use the formula:
\[ \text{Area} = \pi r^2 \]
Where \( r \) is the radius of the circle. Given that the radius \( r \) is 2.1 miles and using \( \pi \approx 3.14 \), the calculation would be:
\[ \text{Area} = 3.14 \times (2.1)^2 \]
First, calculate \( (2.1)^2 \):
\[ (2.1)^2 = 4.41 \]
Now, multiply by \( \pi \):
\[ \text{Area} = 3.14 \times 4.41 \]
Calculating \( 3.14 \times 4.41 \):
\[ 3.14 \times 4.41 \approx 13.8384 \]
Rounding to the hundredths place, the area of the circle is:
\[ \text{Area} \approx 13.84 \text{ square miles} \]
Thus, the estimated area of the circle is 13.84 square miles.