A scientist found the bone of a mammoth. In the lab, the scientist found that 12.5% of the original radioactive C-14 still remained in the bone. Explain why C-14 was used to date the mammoth bone.

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars