One Hawaiian sweet roll contains:
2.5 g fat
18 g carbohydrate
4.0 g protein
The total energy content of four rolls (to two significant figures) is 440 Calories.

Question

Quizplus · Accepted Answer

To calculate the total energy content of the four rolls, we need to multiply the energy content per roll by 4. To do this, we first need to convert the nutritional values to calories.

Fat provides 9 calories per gram, so 2.5 g fat = 22.5 calories 
Carbohydrates provide 4 calories per gram, so 18 g carbs = 72 calories 
Protein also provides 4 calories per gram, so 4.0 g protein = 16 calories

Adding these values up, we get a total of 110.5 calories per roll.

Multiplying this by 4, we get a total of 442 calories for four rolls. Since we are asked to round to two significant figures, the answer is 440 Calories, which is true based on the given information.

One Hawaiian Sweet Roll Contains