Question

On her way to class this morning, the student stops at her favorite coffeehouse and grabs a caffe mocha and a blueberry scone. The caffe mocha contains 260 Calories and the scone contains 460 Calories.

What fraction of the recommended daily caloric intake did she just consume? The estimated calorie the average calorie requirement for a moderately active 20-year-old female at 2100 Calories per day. Express your answer using two significant figures.

Also, convert into kilojoules.

Answer 1

Calories in caffe mocha = 260 Calories

Calories in scone = 460 Calories

Total calories intake = 260 + 460 = 720 calories

Calories required per day = 2100 calories

Fraction of calories consumed = calories intake / calories required

= 720/2100 = 0.34 or 34%

In kilojoules

1 kJ = 239 calories

Total calories intake = 720 calories x 1kJ/239 calories

= 3.012 kJ

Calories required per day = 2100 calories x 1kJ/239 calories

= 8.786 kJ

Fraction of calories consumed = calories intake / calories required

= 3.012/8.786 = 0.34 or 34%