Which of these abbreviations means "three times per day"?

Adverse reactions to narcotic analgesics include all of the following except:

A) respiratory depression B) circulatory depression C) tachycardia D) sedation

At 66 feet below the surface of the water, what would the pressure equal expressed in mm Hg?

a. 760 x 3 = 2280 mm Hg c. 66 x 3 = 198 mm Hg b. 66 x 2 = 132 mm Hg d. 760 x 2 = 1520 mm Hg