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8. A study shows the number of TV sets of a certain brand that are still in service after x years is given by f

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8. A study shows the number of TV sets of a certain brand that are still in service after x years is given by f (x) = e-0.15x (10 pts) a) What fraction of the sets is still in service after 8 years? b) After how many years will the fraction of TV sets still in service be 1/8

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