Akis Bicyle design has determined that when x hundred bicycle are built the average cost per bicycle is given by C(x)=0.1x^2-1.3+8.6 where Cx is in hundreds of dollors How many bicycles should the shop build to minimize the average cost per bicycle Shop should build_____________bicycles.

The relation represents paarbolic curve.

The minimum value occurs at vertes given by (-b/2a, f(-b/2a0).

-b/2a =-(-1.3)/2*0.1

=6.5.