Final answer:
The unit price of one plastic cup from a 4-pack that costs $2.16 is calculated by dividing the total cost by the number of cups, resulting in a unit price of $0.54.
Step-by-step explanation:
The question asks for the unit price of a 4-pack of plastic cups which costs $2.16. To calculate the unit price, you divide the total cost by the number of items in the pack. So in this case, it would be $2.16 divided by 4.
Unit price = Total cost ÷ Number of units
Unit price = $2.16 ÷ 4
Unit price = $0.54
Therefore, the unit price for one plastic cup is $0.54.