Jonas compares two wireless data plans. Which equation gives the correct value of n, the number of GB, for which Plans A and B cost the same? (GB means "gigabytes of data.")

For a short time after a wave is created by wind , the height of the wave can be modeled using y= a sin 2pi(t) / t where a is the amplitude and t is the period of the wave in seconds. how many times over the first 5 seconds does the graph predict the wave to be 2 feet high?