Question

The motion of a simple spring hanging from the ceiling can be modled with a cosine function. The bottom of the spring has a maximum height of 7 feet 4 inches and a minimum height of 6 feet 2 inches from the floor. It takes 2 seconds for the spring to expand from its minimum length to its maximum length. what is a cosine function that models the springs length in inches above and below its average, resting position? express the model as a function of time in seconds