in a certain country there are currently 100 million workers and 40 million retired people. the population of workers is decreasing according to the formula W= 100e^-0.01t, where t is in years and W is in millions. the population of retired people is increasing according to the formula R= 40e^0.09t, where t is in years and R is in millions. how many years will the number of workers equal the number of retired people?

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by mbossom96 at February 20, 2012