Final answer:
For homemade ice cream, combine 10 cups of crushed ice with 2 cups of rock salt to make the brine solution needed for a small ice cream freezer.
Step-by-step explanation:
To create the necessary brine solution for homemade ice cream, one must follow the ratio of 5 cups of crushed ice to 1 cup of rock salt. If the ice cream freezer requires 10 cups of crushed ice, then the amount of rock salt needed would be 10 cups divided by the ratio of ice to salt, which is 5. Therefore, 2 cups of rock salt should be mixed with the 10 cups of crushed ice to achieve a smooth and creamy texture.