The 4 litres of red has to be 2 parts of the mixture, so each part will be 2 litres. Therefore 3 parts of cream will be 6 litres and the one part of blue will be 2 litres.
Answer:
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Plug in 4 for r and 1 for s
r+s^2
4+1^2
Evaluate exponents first (order of operations)
4+1
Add
5
Final answer: 5
The constant of proportionality is 2.5
