If the demand function for math self-help videos is given by 50 - 0.3x, and the total cost function to manufacture the videos is given by 6x + 36, evaluate the marginal profit function at x = 20. 1. Marginal Profit = This means that if production and sales increase by one unit, then total profit will O increase O decrease by approximately dollars. 2. The weekly demand for Xbox Math-Hero video games is given by p = x - 140x + 1350 where x is the number of Xbox video games produced and sold, and p is in dollars. Using the Marginal Revenue function, R'(x), approximate the marginal revenue when 10 Math-Hero video games have been produced and sold. dollars The weekly demand for Math Wars - A New Slope video games is given by 3. P= 210 + 4000 x - where x is the number thousands of video games produced and sold, and p is in dollars. Using the Marginal Revenue function, R'(x), approximate the marginal revenue when 6,000 video games have been produced and sold. dollars 4. Let C(x) represent the cost and R(x) the revenue, in dollars, associated with producing and selling x units of Dr. Little's Winning at Love - A Strategy Guide to the Game of Tennis. If C'(50) = 71 and R'(50) = 187, which one of the following statements is true? O Producing and selling the 51st item will decrease total profits. Since marginal revenue is greater than marginal cost, total profits are negative when 50 items have been sold. O Producing and selling the 51st item will increase total profits. O Producing and selling the 5ist item will have little to no effect on total profits. Since marginal revenue is greater than marginal cost, total profits are positive when 50 items have been sold