Suppose C(x) $c ( x ) = x ^ { 3 } - 16 x ^ { 2 } + 20,000 x$

Multiple Choice

Suppose c(x) $c ( x ) = x ^ { 3 } - 16 x ^ { 2 } + 20,000 x$ x is the cost of manufacturing x items. Find a production level that will minimize the average cost of making x items.

A) 8 items
B) 10 items
C) 9 items
D) 7 items