Trial and error is most useful as a problem solving tactic when:

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?

Einar sees alexandra every day across the room in his history class but has never talked with her. einar likes the way alexandra looks, including the way she dresses and how she wears her hair. he's even more attracted to her apparent intelligence and the way she handles herself in class discussions and during interactions with the instructor. he'd like to know more about her, so he asks one of his friends about her. einar, using a passive strategy to gain information about her, is probably in the preinteraction awareness stage of any relationship that might develop between them. t/f

What natural resource from west africa had a significant im pact on the growth of ghana