2.557.51012.5152.557.51012.51551015202.557.51012.515[[x−8]] = 1, $1.60 if [[x−8]] = 2, and so on. But this isn’t quite right—we are using theFloorfunction ofSection 1.1, whereas we should really be using theCeilingfunction. By the result of Problem 51 of thatsection, we see that instead of costC(x) = 8 + (0.8)[[x−8]]for 8< x16, we should instead writeC(x) =8if 0< x8,8−(0.8)[[−(x−8)]]if 8< x16.The graph of the cost function is shown next.C01S02.080:Solve this problem like Problem 79 (but it is more complicated). Result:C(x) =3
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