Question 6 and question 8

Your last submission is used for your score. 6 DETAILS HARMATHAP11 11.4.013. The radius of a circle is increasing at a rate of 5 ft/min. At what rate is its area changing when the radius is 4 ft? (Recall that for a circle, A = mrs.) ft2/min8 DETAILS HARMATHAP11 11.1.043. Suppose that the total cost (in dollars) for a product is given by C(x) = 1700 + 200 In(2x + 1) where x is the number of units produced. (a) Find the marginal cost MC function. MC = (b) Find the marginal cost when 200 units are produced. (Round your answer to the nearest cent.) $ Interpret your result. O The profit from the next unit will be approximately this amount. It will cost approximately this amount to make the next unit. O This is the total cost of producing 200 units. O This is the total profit from producing 200 units. (c) Total cost functions always increase because producing more items costs more. What then must be true of the marginal cost function? OMC > 0 O MC = 0 OMC SO OMC