Answer
200 bikes
Work Step by Step
$C(x)=2x^2-800x+92000$
Since the graph opens downward, the vertex will have the highest point on the graph.
$a=2$, $b=-800$, $c=92000$
Vertex: $x=-b/2a$
$x=-(-800)/2*2$
$x=800/4$
$x=200$
200 bikes
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 8 - Section 8.6 - Further Graphing of Quadratic Functions - Exercise Set - Page 527: 57a
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