What is the image of point (4, 5) after a counterclockwise rotation of 270º about the origin?

(5, 4)

(−4, −5)

(5, −4)

(−5, 4)

Which is the graph of the function y=2(4)^x

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)