Which of the following is an example of a "smart" exercise choice 1: wear extra layers of clothing 2: swim where a lifeguard can see 3: prepare large meals beforehand 4: decide how much weight to lose

Honestly I would choose 2 or 4 you don't need to eat a large meal so 3 is out and you don't want to wear extra clothes because you could get heat exhaustion which least to a heat stroke which can be fatal so 1 is out.

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.