Pls help and show work, i’m being timed and this is important lol

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

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Atown has a population of 17000 and grows at 2.5% every year. to the nearest year, how long will it be until the population will reach 19600?