SOMEBODY PLEASE HELP ME IN GEOMETRY

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°