Plz help me look at the Picture

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

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?

Find the quotient. 50a2 – 98b2 -5a +7b