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Mathematics 12 Online
OpenStudy (anonymous):

A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of laboratory rats a daily diet of precisely 28.2 units of niacin and 36,420 units of retinol. She uses two types of commercial pellet foods. Food A contains 0.11 unit of niacin and 195 units of retinol per gram. Food B contains 0.35 unit of niacin and 55 units of retinol per gram. How many grams of each food does she feed this group of rats each day?

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