SOLUTION: If the pollution of Lake Erie were stopped suddenly, it has been estimated that the level y of pollutants would decrease according to the formula y = y0e−0.3821t, where t is th

Question 1147953: If the pollution of Lake Erie were stopped suddenly, it has been estimated that the level y of pollutants would decrease according to the formula
y = y0e−0.3821t, where t is the time in years and y0 is the pollutant level at which further pollution ceased. How many years would it take to clear 60% of the pollutants? (Round your answer to three decimal places.)
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If the pollution of Lake Erie were stopped suddenly, it has been estimated that the level y of pollutants would decrease according to the formula
y = y0e−0.3821t, where t is the time in years and y0 is the pollutant level at which further pollution ceased. How many years would it take to clear 60% of the pollutants?
----------------
60% clear ---> 40% remaining = 0.4
====================

t =~ 2.7927 years

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