____ extinguishers have a gauge to measure the pressure of the gas.

If 10 gm of active ingredient is mixed with 500 mL of normal saline, what is the final concentration (w/v)?

A) 0.2% B) 1% C) 2% D) 10%

The minimum safe distance in predicting a safe area when considering a wall collapse is:

A) 33 percent of the wall height. B) 50 percent of the wall height. C) 66 percent of the wall height. D) 100 percent of the wall height.