Page 571 problem 62
62. 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.)
Page 576 problem 68, 82, 84
68. Write a quadratic equation that has each given pair of solutions -2i , 2i
82. Solve each inequality. State the solution set using interval notation and graph x^2-5x+6
This solution is comprised of a detailed explanation to answer for what values of x is Sharon's profit positive.