An observer stands on the bank of a river, and looks directly across the river to a tree on the opposite bank. The angle of elevation from the feet of the observer to the top of the tree is 50 degrees.
If the tree is 20 feet tall, how wide is the river?
Be sure your calculator is in Deg mode, and use the proper trig function on your calculator in the computation.
Round your answer to the nearest tenth of a foot, but do not include "ft" with your response.
