<span>3.2 inches. The nurse if doing a cardiopulmonary resuscitation. It is an emergency procedure combines with chest compression and artificial ventilation. It is done during a cardiac arrest. When doing so the nurse should compress the lower sternum by 3.2 inches.</span>
        
             
        
        
        
Answer: make systematic observations and carefully collect relevant evidence.Then they use logical reasoning and some imagination to develop hypotheses and explanations.
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Answer:
D)  Sea otters are a keystone species as they prevent a herbivorous species from completely destroying a plant species.
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Retina receives lights and transfers it to the Optic Nerve