A glass of skim milk supplies 0.1 mg of iron, 8.5 g of protein, and 1 g of carbohydrates. A quarter pound of lean red meat provides 3.4 mg of iron, 22 g of protein, and 20 g of carbohydrates. Two slices of whole grain bread supply 2.2 mg of iron, 10 g of protein, and 12 g of carbohydrates. If a person on a special diet must have 9.1 mg of iron, 62.5 g of protein, and 53 g of carbohydrates, how many glasses of skim milk, how many quarter-pound servings of meat, and how many two-slice servings of whole grain bread will supply this?

Question

A glass of skim milk supplies 0.1 mg of iron, 8.5 g of protein, and 1 g of carbohydrates. A quarter pound of lean red meat provides 3.4 mg of iron, 22 g of protein, and 20 g of carbohydrates. Two slices of whole grain bread supply 2.2 mg of iron, 10 g of protein, and 12 g of carbohydrates. If a person on a special diet must have 9.1 mg of iron, 62.5 g of protein, and 53 g of carbohydrates, how many glasses of skim milk, how many quarter-pound servings of meat, and how many two-slice servings of whole grain bread will supply this? ​

Quizplus · Accepted Answer

To meet the requirement of 9.1 mg of iron:
- 1 glass of milk provides 0.1 mg of iron, so we need 9 glasses of milk OR
- 2 servings of meat provide a total of 3.4 mg of iron, which is more than enough to meet the requirement

To meet the requirement of 62.5 g of protein:
- 1 glass of milk provides 8.5 g of protein, so we need 7.35 glasses of milk OR
- 1 serving of meat provides 22 g of protein, so we need 2.84 servings of meat OR
- 1 serving of bread provides 10 g of protein, so we need 6.25 servings of bread

To meet the requirement of 53 g of carbohydrates:
- 1 glass of milk provides 1 g of carbohydrates, so we need 53 glasses of milk OR
- 1 serving of meat provides 20 g of carbohydrates, so we need 2.65 servings of meat OR
- 1 serving of bread provides 12 g of carbohydrates, so we need 4.42 servings of bread

Based on these calculations, the only option that meets all the requirements with the least amount of servings is A: 1 glass of milk, 2 servings of meat, and 1 serving of bread.

A Glass of Skim Milk Supplies 0