Help I need help to understand and get it right because if I don't then I can fail my grade

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

If johnny ate 5 cans of sugar, but in the kitchen they only had 3. what did johnny eat? (he found a secret stash btw.)

Five friends found a dollar on the ground and decided they each should get 1/5 of it. what amount of money will each friend get? $0.05 $0.20 $0.30 $0.80