me with number 4, not sure how to answer it

With number 11 ( show how you got the answer)

Your best friend told you that last week scientists disco y that las vegas is responsible for abrupt climate changes. which do you think is best way to research that recent discovery? an encyclopedia usgs internet site a book in the library your best friend’s parents for your ! ❤️

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250