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CalculusQ&A LibraryThe effectiveness of a television commercial depends on how many times a viewer watches it. After some experiments, an advertising agency found that if the effectiveness E is measured on a scale of 0 to 10, then E(n) = 2/3n-1/78n^2 where n is the number of times a viewer watches a given commercial. For a commercial to have maximum effectiveness, how many times should a viewer watch it?Start your trial now! First week only $4.99!*arrow_forward*

Question

The effectiveness of a television commercial depends on how many times a viewer watches it. After some experiments, an advertising agency found that if the effectiveness *E* is measured on a scale of 0 to 10, then

E(n) = 2/3n-1/78n^2

where *n* is the number of times a viewer watches a given commercial. For a commercial to have maximum effectiveness, how many times should a viewer watch it?

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