Could you guys give me a sample problem containing the angles of depression?

Question

I've been asking this for a number of times now. Please! You could at leaste link me to the websites that contain both problems and solutions. Thanks!

Answer 1

there was an airplane going 45 mph and decliing at an angle of 45 degrees. the airport is 5 miles away and the runway is 1 mile long. will he hit any part of the runway if everything stays constant?