Cindy is getting a bonus at work for her high commissions. Her bonus amount is 110% more than what she got last year. How much did she get last year if she received 5500 this year?

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?