Estimate the recommended Calorie intake for an average American adult per day (in Food Calorie/day). Estimate the average power your body consumes...

Assume the average mass of a human is about 60 kg and the average brain mass is about 2 kg.

Most of the brain's energy consumption goes into sustaining the electric charge of neurons. The brain consumes about 10 times more energy than any other part of the body.

Please help me solve these questions or even make other others similar so that /I can solve them.

All numbers must be entered as 5000 or 5e3 or 5.0e3 and not with commas as in "5,000" and not as fractions as in "3/4" and not as percentages as in "70%".