Chest pain that occurs while the patient is at rest and does not go away on its own is called:

In dry pipe sprinkler systems, differential valves use 5 or 6 psi (35 or 41 kPa) of water pressure is held back by ______ of air pressure

a. 2 psi (14 kPa) b. 5 psi (35 kPa) c. 1 psi (7 kPa) d. 10 psi (70 kPa)

Select the correct statement regarding the size of business envelopes

A) The large envelope is a size 10 1/2 and the small is a 6. B) The large envelope is a size 10 and the small is a 6 1/2. C) The large envelope is a size 10 and the small is a 6 3/4. D) The large envelope is a size 10 3/4 and the small is a 6.