A police helicopter is monitoring the speed of two cars on a straight road. The helicopter is at an altitude of 4200 feet directly above the road. At one instant, the angle of elevation from the first car
to the helicopter is 21°, and the angle of elevation from the second car to the helicopter is 16°. How
lár apart are the two cars to the nearest foot?
A) 130 feet
B) 408 feet
©) 3518 feet
D) 3706 feet