a. 12*6=72
b. 220-21=199
c. 129-150 range.
2. Aerobic metabolism, uses fats, proteins and carbohydrates that are oxidized and turned into carbon dioxide and water. Anaerobic metabolism, uses only carbohydrates and enters the fluid, or cytoplasm, of the cell and is turned into lactic acid. Aerobic exercises are running, biking, and swimming, whereas anaerobic exercises are sprinting, jumping, weight training.
3. My activity is considered lower intensity because it is less than 75% of my max heart rate. Whereas this activity is high intensity for my friend because their heart rate is higher than 75% of their max heart rate.
4. I would be relying more on carbohydrates than fats