A bus and a car leave from the same city traveling in opposite directions. The bus leaves 2 hours before the car does. The bus travels at a steady speed of 50 mph while the car travels at 70 mph. After how many hours will the bus and car be 800 miles apart?
If h represents the number of hours the bus travels, then which of the following expressions represents the number of miles the car travels?
a.70(h + 2)
b.70(h - 2)
c.70h