A nurse is caring for a client who is on a ventilator. The nurse checks the vent settings at the beginning of her shift and notes that the FiO2 is set at 40. Based on the nurse’s knowledge of ventilation parameters, which of the following statements is correct?

• The client is using 40% oxygen
• The client is breathing 40 mL of air with each breath
• The client is breathing at a rate of 40 breaths per minute
• The oxygen flow rate for this client is 4 LPM