Final answer:
To find out how much a package with 18 slices would cost at the same price per slice, set up a proportion and solve for the unknown cost. In this case, the cost would be $4.86.
Step-by-step explanation:
To find out how much a package with 18 slices would cost at the same price per slice, we can use the concept of proportion. Let's call the cost of the package with 18 slices 'x'. Since the price per slice is the same, we can set up the proportion: 2.97 / 11 = x / 18. We can cross-multiply and solve for 'x': 2.97 * 18 = 11 * x. Simplifying this equation, we get 53.46 = 11x. Dividing both sides by 11, we find that x = 4.86. Therefore, a package with 18 slices would cost $4.86.
Learn more about Calculating the cost of a package with more slices