810 strands of hair is lost in 9 days (8x10= 80, 80x9=720) count on your fingers (ONLY WHEN MULTIPLYING BY 9) and then put the finger down that you're multiplying 9 by and then look at the fingers around it. (7 and 2 then since its 80 add a 0!)
The apple juice has 27 grams per serving and the sprite has 26 grams per serving. So the apple juice has more. You just divide the total amount by the number of servings.