Which tarsal bone is located directly superior to the calcaneus?

Smoking is responsible for ________ percent of chronic obstructive pulmonary disease (COPD) in United States

a. 60–65 b. 75–80 c. 80–85 d. 85–90

Total-flooding extinguishing systems are used for both surface fires and deep-seated fires. For surface fires a minimum design concentration of ____ carbon dioxide by volume is mandated

a. 10% b. 12% c. 50% d. 34%