Maximum Credit. As of 2012, the maximum credit for dependent care expenses was $2,100 a year. However, the maximum was available only to taxpayers who had paid for care for more than one dependent, had at least $6,000 in dependent care expenses during the year, and had an adjusted gross income of $15,000 or less.A look at how the credit is calculated explains where this $2,100 figure comes from.owever, the maximum was available only to taxpayers who had paid for care for more than one dependent, had at least $6,000 in dependent care expenses during the year, and had an adjusted gross income of $15,000 or less. A look at how the credit is calculated explains where this $2,100 figure comes from.
We breathe in oxygen and some of this carbon dioxide. When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. Paul Roberts, Lake Cathie. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat. The carbohydrates, fat and proteins we consume and digest are eventually converted by a number of different biochemical pathways in the body to glucose (C6H12O6).
The average adult, when resting, inhales and exhales about 7 or 8 liters of air per minute. That totals about 11,000 liters of air per day.Inhaled air is about 20-percent oxygen. Exhaled air is about 15-percent oxygen. Therefore, about 5-percent of breathed air is consumed in each breath.That air is converted to carbon dioxide. So, as far as how much air is actually used, human beings take in about 550 liters of pure oxygen per day.A person who is exercising uses a lot more oxygen than that.herefore, about 5-percent of breathed air is consumed in each breath. That air is converted to carbon dioxide. So, as far as how much air is actually used, human beings take in about 550 liters of pure oxygen per day. A person who is exercising uses a lot more oxygen than that.