6. A company sells an average of 50 skateboards per month at a price of $120 each. Foreach $5 decrease in price, two more skateboards are sold. (a) Determine the price function. p) (b) Determine the revenue function. (c) Determine the marginal revenue when 25 skateboards are sold. (d) At what price will the skateboards sell at when 25 skateboards are sold?

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