Business transactions that represent unsecured accounts receivable in which credit has been extended without a formal written contract are

Which of the following is the most appropriate method of opening the airway of an adult patient with no apparent traumatic injuries?

a. Head tilt/chin lift b. Head tip/neck lift c. Jaw thrust d. No mechanical method is needed

What portion of an FVC maneuver is affected by the dynamic compression of the walls of the airways?

A. first 30% B. last 30% C. last 70% D. first 70%