On a highway a wreck occurred and caused a 15 mile traffic jam on one side of the road. The average car is 12.5 feet in length, the average truck is 30 feet in length, and the average 18
wheeler tractor trailer is 75 feet in length. 60% of the traffic jam consists of cars, 25% trucks,
and 15% 18 wheeler tractor trailers. If the average distance between vehicles is 3.5 feet, how
many vehicles are stuck in the traffic jam?