Question

find the number of units x that produces a minimum average cost per unit.
C=1.25x^2 +25x + 8000

include all steps please.

Answer 1

minimum is at the vertex. first coordinate of the vertex is always
\[x=-\frac{b}{2a}\] so that is what you use, with
\[a=1.25, b=25\] but you will get a negative number which makes no sense in this problem.

Answer 2

maybe it was
\[C=1.25x^2 -25x + 8000 \]

Answer 3

i got it i found the mistake in my work