(4 Marks) Two cars start moving from the same point. One travels south at 50 km/hr and the other travels east at 35 km/hr. At what rate is the distance between the cars increasing three hours later? 5. Find the derivative of each of the following (a) y= e" In (sin(2x))' Simplify your answer. ( b ) ) = In 2x - 3 4x - 5 Simplify your answer. Use logarithmic properties to simplify your work. 2 tan -3x (c) y=- Simplify your answer. sec'3x