Question

-list some of George Washington precedent
-describe Thomas Jefferson achievement before becoming president of the United States
- why was Lewis and clark expedition important?

Answer 1

Your first statement makes no sense.

http://www.biography.com/people/thomas-jefferson-9353715#synopsis

The expedition explored and learned about the wilderness that later became part of the U.S.

Answer 2

http://www.whitehouse.gov/1600/presidents/georgewashington

http://www.biography.com/people/thomas-jefferson-9353715

http://www.history.com/topics/lewis-and-clark

I'm sure your text materials cover these questions, but if you can't read them (or don't want to), read the links above.