An accessories company finds that the cost, in dollars, of producing x belts is given by C(x) = 720 + 33x -0.067x^2. Find the rate at which average cost is changing when 170 belts have been produced. First, find the rate at which the average cost is changing when x belts have been produced. ​

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4