The effectiveness of a television commercial depends on how many times a viewer

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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
3
n − 
1
69
n2
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?

 times

Jul 8th, 2015

Thank you for the opportunity to help you with your question! the solution is as such:

for maximum effectiveness E(n)=10 by the scale of 0 to 10 

so we have 10=2/3n-1/69n^2 rearrange and set to 0

so n= 23

so a viewer must watch it 23 times.


Please let me know if you need any clarification. I'm always happy to answer your questions.awaiting a positive feedback. It was lovely helping you. Please do contact or text me directly for more work assistance. Looking forward to help you again.
Jul 8th, 2015

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