Answer: Carol needs 14 plastic bags.
Step-by-step explanation: Given that Carol makes 
 cups of snacks mix. She puts all the snack mix into plastic bags and she puts 
 cup of the snack mix in each bag.
We are to find the number of plastic bags that Carol needs.
Let, n be the number of plastic bags that Carol needs.
Then, according to the given information, we have

Thus, Carol needs 14 plastic bags.