Question

A supply company manufactures copy machines. The unit cost C (the cost in dollars to make each copy machine) depends on the number of machines made. If X machines are made, then the unit cost is given by the function C(x)=0.6x^2-168x+30,389. What is the minimum unit cost?

Do not round your answer.

Answer 1

Answer:
`\$18,629`

Explanation:

Given

The unit cost is given by

`C(x)=0.6x^2-168x+30,389`

find the derivative of the unit cost and equate it to zero to obtain the minimum value

`C'(x)=0.6* 2x-168\\\Rightarrow 0.6* 2x-168=0\\\Rightarrow 1.2x=168\\\\\Rightarrow x=(168)/(1.2)\\\\\Rightarrow x=140`

Substitute 140 for
`x` in the cost function, we get

`C(140)=0.6[140]^2-168(140)+30,389\\C(140)=11,760-23,520+30,389\\C(140)=\$18,629`