Final answer:
The correct ratio for CPR compressions to breaths for adults for one responder is 30 compressions to 2 breaths, with a target rate of 100 compressions per minute.
Step-by-step explanation:
The recommended ratio of compressions to breaths for adults for one responder performing CPR is 30 compressions to 2 breaths. This technique ensures adequate circulation and oxygenation by manually pumping the heart and providing ventilation to move air in and out of the lungs. The goal is to perform chest compressions at least 5 cm deep and at a rate of 100 compressions per minute, alongside providing two breaths after every 30 compressions. CPR is a critical emergency procedure that buys crucial time for the patient until professional medical help can intervene.