Can you help me in geometry?
ABCD is a square with one side 4cm. BM is perpendicular to the plane of the square and BM=4cm. What is the measure of the dihedral angle whose faces are AMD and CMD?

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.