Question

When x hundred pairs of skates are produce by c(x) =0.1x2-0.3x+0.625 when c(x) is hundreds of dollars what is the cost and how many should be produce to achieve the minimum

Answer 1

0.1x * 2 - 0.3x + 0.625 = 0
0.2x - 0.3x + 0.625 = 0
-0.1x + 0.625 = 0
0.1x = 0.625
x = 6.25