Answer:
3.33 repeated
Step-by-step explanation:
Since we know that 12 copies are $40, we can set up an equation which would look like this.... 40/12=1/x in order to find the unknown, let's call that x, we have to divide both the 40 AND the 12 by 12, the reason we are diving by 12 and not 40 is because we need to identify the cost per copy.
So the overall answer would be 3.33 dollars/1 copy in other words $3.33 per one copy.