State the solution set using interval notation


Question 1: Profitable fruitcake. Sharon’s Revenue R (in dollars) on the sale of x fruitcake is determined by the formula R=50x-x^2.  Her cost C (in dollars) for producing x fruitcakes is given by the formula C = 2x+40. For what values of x is Sharon’s profit positive? (Profit = revenue-cost.)

Question 2: Write a quadratic equation that has each given pair of solutions -2i√3, 2i√3

Question 3: Solve each inequality.  State the solution set using interval notation and graph x^2-5x+6

Question 4: a^2+2a

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