Answer the questions below

In the diagram below what is the approximate length of the minor arc ab

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?

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls