Question

The total nutritional energy in a hamburger is 1690kJ. The total nutritional energy in a bowl of whole wheat pasta with a light sauce is 375,000 calories. Despite the values of the numbers, the hamburger has more nutritional energy in it than the bowl of pasta. How much more? Give the answer in Calories. Round to the nearest whole number. Do not include the units in your answer.

Answer 1

Answer:

28,920

Explanation:

To compare the total nutritional energy of two meals, they have to be expressed in the same unit. Since the question asks us to answer in Calories we need to convert 1690kJ into Calories.

Given that:

$E(kcal)=E(kJ)/4.184\\E(kcal)=1690/4.184\\E(kcal)=403.9197$

1kcal= 1000cal

To convert kcal to cal, we need to multiply the result by 1000

403.9197kcal=403,919.7cal

The difference between the hamburger and the bowl of pasta is

403,919.7cal-375,000cal=28,919.7cal

By rounding to the nearest whole number we obtain the final answer:

28,920

The hamburger has 28,920 calories more than the bowl of whole wheat pasta.

Answer 2

Answer:

29 Calories

Explanation:

1690kJ×1Calorie4.184kJ=403.9Calories

375,000calories×1Calorie1000calories=375Calories

403.9-375 = 28.9

round up to 29 calories.