Week 6a - Section 2 5 Marginal Functions and Linear Approximation: Problen Previous Problem List Next (1 point) The total cost (in dollars) of producing x coffee machines is C(x) = 2000 + 60x - 0.4x (A) Find the exact cost of producing the 21at machine. Exact cost of 21st machine (B) Use marginal cost to approximate the cost of producing the 21st machine Approx. cost of 21st machine = Note W (1 point) Suppose that the cost, in dollars, for a company to produce x pairs of a new line of jeans is C(x) = 3700 + 5x +0.012 +0.0002 () Find the marginal cost function. Answer: (b) Find the marginal cost at x = 100. Answer: (c) Find the cost at x = 100 Answer im partial credit on this problem. GIaIII unanswered. (1 point) The figure below shows f(x) and its local linearization at x = a, y = 4x - 3. (The local linearization is shown in blue.) What is the value of a? What is the value of f(a)? f(a) = Use the linearization to approximate the value of f(4.5). f(4.5) = Is the approximation an under- or overestimate? under