# SOLUTION: A video store sells about 100 DVDs a week at a price of \$21 each. The owner estimates that for each \$3 decrease in price, about 20 more DVDs will be sold each week. How can the ow

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 Question 599430: A video store sells about 100 DVDs a week at a price of \$21 each. The owner estimates that for each \$3 decrease in price, about 20 more DVDs will be sold each week. How can the owner maximize weekly revenue?Answer by josmiceli(9676)   (Show Source): You can put this solution on YOUR website!Let = the number of \$3 decreases in price Let = weekly revenue given: This parabola has a maximum since the coefficient of the term is minus The maximum is at when the equation has the form When , The owner can maximize revenue by decreasing the price once by \$3/CD check: ------------- ------------- OK