Iwould greatly appreciate someones assistance in answering this question: which of the following is true for cpr chest compressions? a. compressions should be between 2.5 and 3 inches. b. 50 compressions should be followed by 2 rescue breaths. c. 100 compressions should be performed every minute. d. elbows should be relaxed.

C,100 beats per minute

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.

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.