Hi my friend plays this game called Animal jam classic, all she's wanted was a membership, but her fam can't afford it, both of her parents were put out of there jobs. They can barely pay the bills. Anyways if you could help me out in buying her a membership here is her username and password, username: sirflexalot :password: presley. thanks a million if you decide to help her out. Be safe :)

Answer these questions showing your work plz

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

If the value of cos330°is√3/2 then find cos 165°.