Marcus got a ratio of correctly answered questions to total questions of 9 : 12 on his past quiz. What percent of the quiz did Marcus answer incorrectly?
I NEED HELP QUICKK

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

Solve this problem! extra ! 3025/5.5 = a/90.75