31. [-/2 Points] DETAILS HARMATHAP12 9.7.043. MY NOTES ASK YOUR TEACHER PR An inferior product with an extensive advertising campaign does well when it is released, but sales decline as people discontinue use of the product. If the sales S (in thousands of dollars) after t weeks are given by 230t S(t) = t20 (t + 5)2" what is the rate of change of sales when t = 10? (Round your answer to two decimal places.) s'(t) = Interpret your result. O From the 10th to the 11th week, sales will decrease approximately |S'(t) | dollars. O From the 10th to the 11th week, sales will decrease approximately |S'(t) | thousand dollars. O From the 10th to the 11th week, sales will increase approximately |S'(t) | thousand dollars. O From the 10th to the 11th week, sales will increase approximately |S'(t) | dollars. Need Help? Read It 32. [-/1 Points] DETAILS HARMATHAP12 9.7.035. MY NOTES ASK YOUR TEACHER PR The total physical output P of workers is a function of the number of workers, x. The function P = f(x) is called the physical productivity function. Suppose that the physical productivity of x construction workers is given by P = 6(4x + 4)5- 8. Find the marginal physical productivity, dP/dx. dP/dx = Need Help? Read It Watch It