You are responding to a fight at a restaurant and find a man, conscious and alert. his face is mottled with blisters and abrasions, and he has blood on his shirt. he tells you he was trying to stop the fight when he was hit in the face with scalding hot coffee and fell backwards over a chair. according to the rule of nines, what percentage of the patient's skin surface is burned?

Waste water from industries and domestic sources can be treated by chlorination or ultraviolet radiation. there are pros and cons to using either chlorine or uv radiation to kill harmful microorganisms. what is one reason chlorination would be preferred over ultraviolet radiation? a) chlorine only eliminates visible impurities and is ineffective against microorganisms. b) chlorine not only kills bacteria but provides a residual effect on returning microorganisms. c) uv radiation can be used only to treat drinking water and is ineffective in treating waste water. d) ultraviolet radiation is more effective