It is a fact of nature that fire runs ____.

Which of the following statements shows an understanding by the speaker of the use of a pocket mask?

a. "Although a pocket mask is very effective at ventilating a patient, you are directly exposed to the patient's secretions." b. "A pocket mask must be securely placed over the patient's mouth and nose." c. "When using a pocket mask to ventilate a patient, you must make sure that the reservoir bag is in place." d. "A pocket mask should be used only when oxygen is connected to it."

The area benefit of the middle ear transformer is approximately ____________________ dB

Fill in the blank(s) with correct word