A hall charges $30 per person for a sports banquet when 120 people attend. For every 10 extra people that attend, the hall will decrease the price by $1.50 per person. What number of people will maximize the revenue for the hall?
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hala718
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Let x be the number of people attends.
Let the revenue be y.
Let the initial revenue when 120 people attend is 30*120 = 3600
y= people attend * price
y= (120+x)*(30- 1.5*(x/10)]
y= ...
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