Marielle was in an accident. Her car left 2 skid marks of 48 and 52 feet. Her brakes
were operating at 80% efficiency at the
time of the accident and the drag factor is
.75.
What was the speed Marielle was
traveling when she started to brake?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min