A police helicopter is flying due north at 100 mi/h and at a constant altitude of ; mi. Below, a car is traveling west on a highway at 75 mi/h. At the moment the helicopter crosses over the highway the car is 2 mi east of the helicopter. (a) How fast is the distance between the car and helicopter changing at the moment the helicopter crosses the high- way? (b) Isthe distance between the car and helicopter increasing or decreasing at that moment?

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