A cheeseburger from a fast food restaurant contains 19 g of fat, 20. g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9.0 kcal/g for fat, and 4.0 kcal/g for protein.) Report the answer to 2 significant figures.

Question

Quizplus · Accepted Answer

To calculate the energy in the cheeseburger, we need to use the caloric values for each macronutrient:

Fat: 19 g * 9.0 kcal/g = 171 kcal
Carbohydrate: 20 g * 4.0 kcal/g = 80 kcal
Protein: 28 g * 4.0 kcal/g = 112 kcal

Total energy: 171 kcal + 80 kcal + 112 kcal = 363 kcal

Rounding to 2 significant figures gives us the answer of 360 kcal, which is option B.

A Cheeseburger from a Fast Food Restaurant Contains 19 G