Please Help Me I will give you 95 points please and the brainliest!!

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Paco orders an ice cream for $1, but realizes his wallet is at home and he only has 3/20 of $1 with him. if his mom pays the remaining 7/20 of the dollar, how much will she pay? $0.05 $0.15 $0.85 $0.95

Zack and tia played chess for 50 min they put the chessboard away at 11: 20 when did they start