Explain the difference between alphanumeric, full-sentence, and decimal outlines.

Well base off what I read and picked up...an alphanumeric outline has Roman numerals, capitalized letters, Arabic numerals, and lowercase letters. A full-sentence outline is the same as an alphanumeric outline except that it uses full sentences. A decimal outline is similar to an alphanumeric outline except it uses decimal notation in place of the Roman numeral/capitalized letter/Arabic numeral/lowercase letter structure. Hope that helps you ;)