Answer
(a) $\approx 0.8~miles$
(b) $C\approx 13,031~feet$
(c) $C\approx 2.5~miles$
Work Step by Step
(a)
We convert feet to miles:
$4150~feet*\frac{1~mile}{5280~feet}\approx 0.8~miles$
(b)
We know that the circumference of a circle is given by the formula:
$Circumference=\pi~diameter$
$C=\pi *4150~feet\approx 13,031~feet$
(c)
We repeat part (b) with miles:
$C=\pi *0.8~miles\approx 2.5~miles$
