How many calories are there in a 255 Food Calorie snack bar?

a. 1 x 103

b. 2.55 x 105

c. 1.07 x 103

d. 60.9

e. none of the above

2.55 * 10⁵ calories

Explanation:

The Food Calorie is an energy unit commonly used to describe the energy content of foods. 1 Food Calorie is equal to 1 kilocalorie. The kilocalories corresponding to 255 Food Calories is:

255 Food Calorie * (1 kcal/1 Food Calorie) = 2.55 * 10² kcal

1 kilocalorie is equal to 1000 calories. The calories corresponding to 2.55 * 10² kilocalories is:

2.55 * 10² kcal * (1000 cal / 1 kcal) = 2.55 * 10⁵ cal