what is the image of the point (2,-3) after a rotation of 180 degrees counterclockwise about the origin ?

Pls! does anybody know a shortcut for answering these types of questions in the future?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?