Can someone me with the circumferences and other stuff on this picture (zoom out to see the full picture)

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?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing