Trig Problem Set Ginger is sitting in an observation post that has been built in a tree. She looks down on the Professor with an angle of depression of 50
degrees. What is the angle of elevation from the Professor to Ginger?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)