Answer:
The marginal cost at the given production level is $49.9.
Step-by-step explanation:
The marginal cost function is expressed as the first derivative of the total cost function with respect to quantity (x).
We have that the cost function is given by

So, we need the derivative and then we’ll need to compute the value x = 100 of the derivative.

When x = 100, the marginal cost is

Next time, Shay, please include the instructions. I'm assuming that our job here is to determine the largest # of boxes of darts that can be purchased.
Shirt cost + x(box of darts cost) = Initial amount
$56 + x($6/box) = $80
Then 56 + 6x = 80, or 6x= 24, or x = 4. He can buy 4 boxes of darts.
Answer: 12
Step-by-step explanation:
90 < 0.60m + 75
90 - 75 < 0.60m
15 < 0.60m
15/0.60 < m
25 < m.....company A charges less at 24 miles or less