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Problem [4] Factory is polluting a lake in such a way that rate of pollutant (population) entering lake at time (t) in months. N' (t)

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Problem [4] Factory is polluting a lake in such a way that rate of pollutant (population) entering lake at time (t) in months. N' (t) = 280 t4 N = pounds of pollutant in lake at time, t. (a) How many pounds enter lake in 10 months (b) Cleanup must begin after 377,000 lbs. After what length of time will this occur.

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