Are they a run on sentence or a sentence

Which two pieces of evidence support the idea that coal is underutilized? this was on study island about coal

Plz which of the following is true about third-person limited point of view? it uses the word i, and one character tells the story. it uses the word you and makes the reader feel a part of the story. the narrator is not part of the story and only states the characters' actions and speech. the narrator is not part of the story but knows what one character is thinking and feeling.

Which function is positive for the entire interval (-3, -2]?