The ratio of the number of yellow circles to the number of white circles is 1 : 4. For each yellow circle there are 4 white circles. The ratio 3 : 12 is equivalent to 1 : 4 because for each yellow ...
†Separation Processes Development Laboratory (LDPS), School of Chemical Engineering, University of Campinas, UNICAMP, Zipcode 13083-852, Campinas-SP, Brazil ‡ Optimization, Project and Advanced ...
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