I got C. 92.08
I'm not 100% sure I did this right, but I took the money gained between years nine and eleven and divided it by 2. I tried a few other ways, but none of my answers were choices.
Shortest is Vindale to Wildgrove to Clarksville
18.9 + 13.2 = 32.1 km.
I believe the equation y=(2-7)^2 has 1 solution which is y=25
