What is the percentage of total atmospheric gas that is made up of oxygen?

An example of an enteral route of drug administration is:

a. rectal. c. subcutaneous. b. intradermal. d. intravenous.

With the ICD-10 conversion, electronic billing systems must allow for input of _______________in every coding field

a. alphanumeric b. numbers only c. alpha characters only d. roman numerals