Question

Okay last time I am going to try this problem. Aki's Bicycle Designs has determined that when x hundred bicyc,es are built, the average cost per bicycle is given by C(x)=0.5x^2-0.8x+6.192, where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?

Answer 1

I have worked this problem multiple times and can never get the right answer.

Answer 2

vertex is
\[-\frac{b}{2a}\] with
\[a=.5,b=-0.8\]

Answer 3

so you get
\[-\frac{-.8}{2\times .5}=.8\]

Answer 4

so .8 of 100 is 80. should build 80 bikes.

Answer 5

thank you