Cara asked:


An airplane that is 4000 ft. in the air and is going 300 mph is being tracked at an observation point. At that moment the observation points elevation angle is pi/6. How fast is the angle decreasing? How fast is the distance between the aircraft and the observation point changing? (one mile= 5280 feet).

***showing how you solved the problem would be great.
the plane is flying directly away from the observation point.