A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat. If the pizza contains 280 kcal, how many grams of fat are present? Report the answer to 2 significant figures.

Question

Quizplus · Accepted Answer

To solve this problem, we need to use the fact that one gram of carbohydrate or protein provides 4 kcal, and one gram of fat provides 9 kcal.

Let x be the amount of fat in grams. Then we have the equation:

29(4) + 13(4) + x(9) = 280

Simplifying and solving for x, we get:

x = (280 - 29(4) - 13(4))/9 ≈ 12

Therefore, the pizza contains approximately 12 g of fat. The closest answer choice is B, which is the correct answer.

A Slice of Pizza Contains 29 G of Carbohydrate, 13