Question: A ball that is bobbing up and down on the end of a spring has a maximum displacement of 3 inches. Its motion (in ideal

A ball that is bobbing up and down on the end of a spring has a maximum displacement of 3 inches. Its motion (in ideal conditions) is modeled by y = 1/4 cos 16t, t > 0, where y is measured in feet and t is the time in seconds. is the time in seconds.
(a) Graph the function.
(b) What is the period of the oscillations?
(c) Determine the first time the weight passes the point of equilibrium (y = 0).

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