Final answer:
To find the total cost for 120 more copies, set up a proportion and solve for x. The total cost would be approximately $52.20.
Step-by-step explanation:
In this problem, the cost of printing fliers is directly proportional to the number of copies. This means that as the number of copies increases, the cost also increases proportionally. To find the total cost for 120 more copies, we first need to determine the constant of variation.
We can use the given information to set up a proportion:
$45 / 750 = x / (750 + 120)
Cross multiplying gives us:
750x = 45 * 870
Dividing both sides by 750 gives us:
x = 45 * 870 / 750
x ≈ $52.20
Therefore, the total cost for 120 more copies would be approximately $52.20.