Question

Lizzy has a recipe that calls for milk with 4% butterfat, but she only has 9% butterfat whipping cream and milk with 2% butterfat. How much whipping cream should be mixed with 2.5 cups of milk with 2% butterfat to obtain milk with 4% butterfat?

Answer 1

To obtain milk with 4% butterfat, you will need to mix 5.625 cups of whipping cream with 2.5 cups of milk with 2% butterfat.

Step-by-step explanation:

To obtain milk with 4% butterfat, we need to mix whipping cream with 9% butterfat and milk with 2% butterfat. Let's assume x cups of whipping cream are needed.

We can set up the equation (0.09x + 0.02 * 2.5) / (x + 2.5) = 0.04 to represent the butterfat percentage in the mixture.

Simplifying and solving the equation, we find that x = 5.625 cups of whipping cream.