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Find the multiplicative inverse of 8-12i

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74

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?