According to the Nutrition Facts panel on a box of granola bars, a single bar provide 5 grams of fat, 19 grams of carbohydrate, and 7 grams of protein. After working out, Carter ate 3 of the granola bars. Calculate the number of kcal he consumed by eating the 3 bars.

447 calories

Explanation:

1 gram of fat is 9 calories

1 gram of carbohydrate is 4 calories

1 gram of protein is 4 calories

In one granola bar:

5 grams of fat = 5 x 9 = 45 calories

19 gram of carbohydrates = 19 x 4 = 76 calories

7 grams of protein = 7 x 4 = 28 calories

for a total of 45 + 76 + 28 = 149 calories

If Carter ate 3 granola bars then 149 x 3 = 447 calories

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