Final answer:
To make slime using 12 cups of glue according to the given ratio of 1/2 part starch to 3 parts glue, you will need 2 cups of starch.
Step-by-step explanation:
To determine how many cups of starch are needed to make slime when you have 12 cups of glue, we need to set up a proportion based on the given ratio of ingredients. The original ratio is 1/2 parts starch to 3 parts glue. We can write this as: 1/2 cup starch / 3 cups glue = x cups starch / 12 cups glue, where x is the amount of starch needed.
Now, let's solve for x:
- 1/2 x 12 = 3 x x
- 6 = 3 x
- x = 6 / 3
- x = 2
So, you will need 2 cups of starch for 12 cups of glue.