Answers by visitors named: Vasunder Macharla

We know the function is sinusoidal because the gum is moving on the rim of a circle. We need negative cosine because it is at ground level at t = 0. We also need the time of one revolution: (15mi/hr)(5280ft/mi)(1hr/3600s) = 264in/s (264in/s)(1 rev/28Пin) = (66/7П)revolutions/sec 7П/66sec/rev Hence the function is: h = 14[ - (cos(132/7)t) + 1]