To find the circumference \( C \) of a circle, you can use the formula:
\[ C = \pi \times d \]
where \( d \) is the diameter of the circle. In this case, the diameter \( d \) is 5.75 miles.
Using \( \pi \approx 3.14 \):
\[ C = 3.14 \times 5.75 \]
Now, we can perform the multiplication:
\[ C = 3.14 \times 5.75 = 18.075 \]
To estimate the circumference to the hundredths place, we round 18.075 to:
\[ C \approx 18.08 \text{ miles} \]
So, the estimated circumference of the circle is 18.08 miles.