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Mathematics
Problem
The total cost (in dollars) of producing
q
q
q
widgets is
C
(
q
)
=
q
2
+
36
q
+
400
C(q)=q^{2}+36q+400
C
(
q
)
=
q
2
+
36
q
+
400
for
q
>
0
q>0
q
>
0
. For what production level is the average cost per widget minimized? a)
q
=
18
q=18
q
=
18
b)
q
=
20
q=20
q
=
20
c)
q
=
15
q=15
q
=
15
d)
q
=
25
q=25
q
=
25
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