Question

A glass of 5kim milk supplies 0.1mg of iron, 8.5 g of protein, and 1 g of carbohydrates. A quarter pound of lean red meat provides 3.4mg of 22 g of protein, and 20 g of carbohydrates. Two slices of whole-grain bread supply 2.2mg of iron, 10 g of protein, and 12 g of carbohydrates. person on a special diet must have 28.7mg of iron, 179 g of protein, and 162 g of carbohydrates, how many glasses of skim milik, how many quarter-pound servings of meat, and how many two-slice servings of whole-grain bread will supply this? skim milk glasses meat quarter-pound servings Whole-grain bread two-silice servings

Answer 1

8 servings of red meat and 1 serving of whole-grain bread will meet the dietary requirements.

Step-by-step explanation:

The best way to understand and solve this problem is to set up a spreadsheet to keep everything straight. See the attached spreadsheet image.

Each source of nutrition has the individual contributions of iron, protein, and carbohydrates assigned. (I assumed that the "3.4mg of 22 g of protein . . ." for the red meat was supposed to read "3.4mg of iron, 22 g of protein . . "

The section titled "Servings Required," is not an absolute requirement to solve the problem, but it offers insight as to which food items offer the best source of individual nutrients. The values are obtained by dividing the dietary need by the food item content (e.g., 287 servings of skim milk would be required to provide the 28.7mg of iron required for the diet. We can now identify the primary sources for each of the required nutrients. 1 serving, or two slices, of whole wheat bread supplies all of the needed carbs, for example.

The lower section of the table is a work area that takes the number of servings ("Servings =") that are entered in an attempt to meet all of the nutrition requirements. The serving number is then multiplied by the serving content for that food item and the total for each nutrient is summed to the right. The difference between this calculated amount and the required amount is shown, in this case all are in surplus.

There can be various combinations to achieve the needed nutrient levels. The solution chosen here was one that minimized the food intake. 8 servings of red meat supply nearly all of the required nutrients. 2 slices of bread (1 serving) supply the additional protein required. No skim milk is needed.

The result is 8 servings of red meat and 1 serving of whole-grain bread will meet the dietary requirements.