8:19 Yesterday Edit .. . 11:13 PM Problem 15. (1 point) Problem 16. (1 point) NOTE: When using interval notation in WeBWork, remember NOTE: When using interval notation that that You use 'INF' for co and '-INF' for -co. You use 'INF' for co and '-INF' for -co. And use 'U' for the union symbol. And use "U' for the union symbol. Enter DNE if an answer does not exist. Enter DNE if an answer does not exist. f(x ) = -41+4 f(x) =x-4.5x2-1 a) Determine the intervals on which f is concave up and concave a) Determine the intervals on which f is down. down. f is concave up on: f is concave up on: f is concave down on: f is concave down on: b) Based on your answer to part (a), determine the inflection points b) Based on your answer to part (a), deter of f. Each point should be entered as an ordered pair (that is, in of f. Each point should be entered as an the form (x,y)). the form (x,y)). - (Separate multiple answer (Separate multiple answers by commas.) c) Find the critical numbers of f and use the Second Derivative c) Find the critical numbers of f and u Test, when possible, to determine the re Test, when possible, to determine the relative extrema. List only the x-coordinates. the x-coordinates. Relative maxima at: (Separ Relative maxima at: (Separate multiple answers by commas.) commas.) Relative minima at: Relative minima at: (Separate multiple answers by (Separ commas.) commas.) d) Find the x-value(s) where f'(x) has a relative maximum or d) Find the x-value(s) where f'(x) has minimum. minimum. f' has relative maxima at: f has relative maxima at: (Separate multiple answers by commas.) by commas.) f' has relative minima at: f has relative minima at: (Separate multiple answers by commas.) by commas.) Answer(s) submitted: Answer(s) submitted: . no response . no response . no response . no response . no response . no response . no response no response . no response no response . no response no response . no response . no response submitted: (incorrect) submitted: (incorrect) recorded: (incorrect) recorded: (incorrect) O i8:16 Course MATH 132-CO3 Busin... . . . IVIV MATHEMATICAL ASSOCIATION OF AMERICA Logged in as Manuel Nunes. Log Out [- WeBWork / Math-132-Elashvili-f23 > / 10 - The Second Order Derivative / 11 Previous Problem Problem List Next Problem 10 - The Second Order Derivative: Problem 11 (1 point) If the figure below is the graph of the derivative f , answer the following: Where do the points of inflection of f occur? On which interval (s) is f concave down? Note: You can earn partial credit on this problem. Preview My Answers Submit Answers Stream Courses Calendar More8218 (course MATH 132-c03 Busin... I / 1O The Second Order Derivative / 18 Previous Problem Problem List Next Problem 10 - The Second Order Derivative: Problem 18 (1 point) The total cost (in dollars) of producing a; coffee machines is 0(3) : 1600 + 50a: 0.32:2. (A) Find the exact cost of producing the 21st machine. Exact cost of 215t machine = 22972 (B) Use marginal cost to approximate the cost of producing the 21st machine. Approx. cost of 21st machine : Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 2 times. Your overall recorded score is 0%. You have unlimited attempts remaining. Email Instructor l-l @ E Stream Courses Calendar More