ned is a professional jump roper he can jump rope at such a constant rate that the height of the canter of the jump rope can be modelled by simple harmonic motion. he starts jumping rope with the rope on the floor(at the ropes lowest height of 0 feet) at time t = 0. 

The rope reaches a maximum height of 8 feet after 1/5 seconds(you may use decimal approximations, rounding to 2 decimal places.

 find an equation that describes the height of the jump rope as a function of seconds after ned starts jumping rope?