Problem #3: Let /(x) = x - 7x6 +5. (a) Find the absolute maximum of f(x) on the interval -1 sas 7. (b) Find the absolute minimum of f(x) on the interval -1 sxs 7. Problem # 3(a): Problem #3[b): Just Save Submit Problem #3 for Grading Problem #3 Attempt #1 Attempt #2 Attempt #3 Your Answer: 1(a) Your Mark: 3(a) 3(b) Problem #4: Suppose that the price at which x units of a particular commodity can be sold is given by p(x) = 356 -4x and that the total cost of producing x units is C(x) = 4x- + 9x + 705. (a) Find the level of production x at which the profit function P(x) is maximized. (b) Determine the level of production x at which the average cost A(x) = C(x)x is minimized. Problem #4(a): Round your answer to 2 decimals. Problem #4[b): Round your answer to 2 decimals. Just Save Submit Problem #4 for Grading Problem #4 Attempt #1 Attempt #2 Attempt # Your Answer: 4(8) 4(a) 4(b) 4(b) 4(b) Your Mark: 4(a) 4(8) 4(b) Problem #5: Find two positive numbers x and y with a sum of 136 and such that xy' is as large as possible. Problem #5: Enter the values of x and y, separated by a comma. Just Save Submit Problem #5 for Grading Problem #5 Attempt #1 Attempt #2 Attempt #2 Your Answer: Your Mark