Homework 4

questions 14 and 15

15. DETAILS HARMATHAP11 12.1.047. ASK YOUR TEAC A factory is dumping pollutants into a river at a rate given by dx/dt = to/4/600 tons per week, where t is the time in weeks since the dumping began and x is the number of tons of pollutants. (a) Find the equation for total tons of pollutants dumped. x(t) = (b) How many tons were dumped during the first year? (Round your answer to two decimal places.) tons14. DETAILS HARMATHAP11 12.4.005. . . . . 4. . . .............s................ ...................... Cost, revenue, and profit are in dollars and x is the number of units. If the marginal cost for a product is MC = 8x + 90 and the total cost of producing 30 units is $7000, find the cost of producing 25 units. $