Given:
Given that the radius of circle is 3 miles.
We need to determine the area of the circle.
Area of the circle:
The area of the circle can be determined using the formula,
[tex]A=\pi r^2[/tex]
where r is the radius of the circle.
Substituting π = 3.14 and r = 3 in the above formula, we get;
[tex]A=(3.14)(3)^2[/tex]
Simplifying, we get;
[tex]A=(3.14)(9)[/tex]
Multiplying, we have;
[tex]A=28.26[/tex]
Rounding off to the nearest tenth, we get;
[tex]A=28.3[/tex]
Thus, the area of the circle is 28.3 square miles.