What is the answer of how to round 42,429

Graph the equation by plotting point x=2

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.