URGENT: Belinda throws a tennis ball upward at a velocity of 65 feet per second, releasing the ball when it is 4 feet above the ground. The height of the ball t seconds after being thrown is given by the formula. Find the time at which the tennis ball reaches its maximum height. A.
4 seconds
B.
70 seconds
C.
140 seconds
D.
2 seconds

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.