The equation of a demand curve for computers is , where represents the quantity of computers demanded, and represents the price of computers. the equation of a supply curve for computers is , where represents the quantity of computers supplied,, and represents the price of computers. what is the consumer surplus in the market at the equilibrium price and quantity?

Google started as one of many internet search engines, amazon started as an online book seller, and ebay began as a site where people could sell used personal items in auctions. these firms have grown to be so large and dominant that they are facing antitrust scrutiny from competition regulators in the us and elsewhere. did these online giants grow by fairly beating competition, or did they use unfair advantages? are there any clouds on the horizon for these firms -- could they face diseconomies of scale or diseconomies of scope as they continue to grow? if so, what factors may limit their continued growth?