Monday, June 20, 2011

help me solve by quadratic inequalityPLEASE!?

Profitable fruitcakes. Sharon's revenue R (in dollars) on the sale of x fruitcakes is determined by the formula R=50x-x^2. Her cost c (in dollars) for producing x fruit cakes is given by formula C=2x+40. For what values of x is Sharon's profit positive? (profit=revenue – cost)


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