Apolice helicopter is flying at 150 mph at a constant altitude of 0.5 mile above a straight road. the pilot uses radar to determine that an oncoming car is at a distance of exactly 1 mile from the helicopter, and that this distance is decreasing at 190 mph. find the speed of the car. (a) draw a picture of the situation for any time t. (b) what quantities are given in the problem? what is the unknown quantity you are looking for? (c) write an equation that relates the quantities. (d) finish solving the problem.