Answer:
The unit rate is: a mix of juice = 12/36 or 1/3 of water
Explanation:
A unit rate is commonly expressed as a fraction, in this case, the problem says that you combine 12 ounces of mix with 36 ounces of water.
So we can express this as 12/36 = 1/3
This means that you need 1/3 of water to know how many of the mix you need.
For example, if we now say that we need 50 ounces of water we multiply:
50* 1/3 = 16.66 ounces of mix.