Air pollution. Air quality standards establish maximum amounts of pollutants considered...

Air pollution. Air quality standards establish maximum amounts of pollutants considered acceptable in the air. The amounts are frequently given in parts per million (ppm). A standard of 30 ppm also can be expressed as follows:

In Problem, express the given standout

(A) In scientific notation

(B) In standard decimal notation

(C) As a percent

9 ppm, the standard for carbon monoxide, when averaged over a period of 8 hours