83. Nutrition. A dietitian in a hospital is to arrange a special diet composed of three basic foods. The diet is to incl
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83. Nutrition. A dietitian in a hospital is to arrange a special diet composed of three basic foods. The diet is to include exactly 340 units of calcium, 180 units of iron, and 220 units of vitamin A. The number of units per ounce of each special ingredient for each of the foods is indicated in the table. Calcium Iron Vitamin A Food A 30 10 10 Units per Ounce Food B 10 10 30 Food C 20 20 20 (A) How many ounces of each food must be used to meet the diet requirements? (B) How is the diet in part (A) affected if food C is not used? (C) How is the diet in part (A) affected if the vitamin A re- quirement is dropped?
84. Nutrition. Repeat Problem 83 if the diet is to include exactly 400 units of calcium, 160 units of iron, and 240 units of vitamin A.