9. It is estimated that t years from now the population of a certain lakeside community...

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9. It is estimated that t years from now the population of a certain lakeside community will be changing at the rate of 0.6t2 +0.2t + 0.5 thousand people per year. Environmentalists have found that the level of pollu- tion in the lake increases at the rate of approximately 5 units per 1000 people. By how much will the pollution in the lake increase during the next 2 years? 9. It is estimated that t years from now the population of a certain lakeside community will be changing at the rate of 0.6t2 +0.2t + 0.5 thousand people per year. Environmentalists have found that the level of pollu- tion in the lake increases at the rate of approximately 5 units per 1000 people. By how much will the pollution in the lake increase during the next 2 years?

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