Write each of the following percents as a fraction. Simplify as necessary.a. 40%b. 87%c. 140%d. 8%

A simple face mask running at 10 to 12 liters per minute will supply which of the following oxygen concentrations?

A) 60 to 90 percent B) 80 to 100 percent C) 40 to 50 percent D) 50 to 65 percent

Which of the following is a primary factor in calculating the required flow rate for a building?

a. water supply b. contents c. access d. age