Inactive Tutor answered 11/27/17
Tutor
New to Wyzant
1. should be ...major components (plural) since the word ARE appears earlier in the sentence.
2. the answer to this question is probably in the introductory part of your textbook. I suggest that you read that over carefully.
Without careful reading, you're going to be a little lost in the course because there's a lot of detail (definitions) and formulas.