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Mathematics, 21.02.2020 18:53 biggz8567

The National Research Council recommends keeping a 1:3, colon, 3 copper to zinc ratio in a horse's diet. If the horse is getting 420 milligrams (\text{mg})(mg)left parenthesis, start text, m, g, end text, right parenthesis of zinc per day, how many milligrams of copper does the Council recommend the horse have?

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