Answer
2179 mi
Work Step by Step
Step 1. Draw a diagram as shown. Note: distance = speed X time, and the angle $170^{\circ}$ is the supplement of $10^{\circ}$ given in the problem.
Step 2. Use the Law of Cosines, the distance of end point to the starting point is $d^2=1250^2+937.5^2-2\times1250\times937.5\times cos170^{\circ}$ which gives $d\approx2179 mi$
