An airplane begins its descent with an average speed of 240 mph at an angle of depression of 4°. how much altitude will the plane lose in 5 min. round to the nearest tenth of a mile.
Distance=speed*time distance covered by plane in 5 min will be: distance=240×5/60=20 miles thus the altitude lost will be: sin θ=opposite/hypotenuse sin 4=h/20 h=20sin 4 h=1.395 miles~1.4 miles
