ACK Question 16, 1.6.53-BE HW Score: 88.89%, 10 1.6 Enhanced Homework Part 1 of 2 Points: 0 of 1 K An accessories company finds that the cost, in dollars, of producing x belts is given by C(x) = 790 + 34x - 0.061x. Find the rate at which average cost is changing when 178 belts have been produced. First, find the rate at which the average cost is changing when x belts have been produced. C'(x) =