a certain drug is made from only two ingredients: compound A and comppund B. There are 5 milliliters of compound A used for ever y 4 milliliters of compound B. if a chemist wants to make 477 milliliters of the drug, how many milliliters of compound A are needed?
1 answer:
4:5 is the same as 4x:5x where 4x is compound A and 5x is compound B.
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