with detailed solution

Vill. (10 points) Two men start walking from the same point. One walks north at = ft/s and the other walks east at 4 ft/s. At what rate is the distance between the men increasing after 15 minutes? IX. (10 points) The average cost (in pesos) of producing a handwoven purse is given by Q(x) = - + 30+ 0.5x and the profit is given by P(x) = -100 + 60x - 0.3x2. Find the marginal revenue of the 11" purse. Compare your answer to the actual revenue of the 11" purse