The ratio of the lengths of the sides of △abc is 2: 3: 4. points m, n, and k are the midpoints of the sides. perimeter of △mnk equals 7.2 in. find the length of the sides of △abc.

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35 ̊ and to the other is 52 ̊. how far apart are the cars?