An airplane passes over a radar tracking station at A and continues to fly due east. When the plane is at P, the distance and angle of elevation of the plane are, respectively, r = 12,600 ft and θ = 31.2?. Two seconds later the radar station sights the plane at r = 13,600 ft and θ = 28.3?. Determine approximately the speed and the angle of dive α of the plane during the 2-s interval.

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