Answer:

Step-by-step explanation:


The equation in this question is modeled by:

So all you need to do is put the numbers in this equation!

The answers would be:

312211,13112221
Visual explanation in the attachment. I hope you'll understand ;)
Answer:
260 machines for minimum cost.
Step-by-step explanation:
c(x) = 0.3x^2 - 156x + 26.657
Finding the derivative:
c'(x) = 0.6x - 156
0.6x - 156 = 0 for maxm/minm cost.
x = 156 / 0.6
= 260
The second derivative is positive (0.6) so this is a minimum.