Plz help it is kind of easy i will give alot of points to anyone that knows the answers​

Kerion has a beaded necklace business. she can make 12 necklaces is 2 hours. how long will it take her to make 9 necklaces?

Mario and luigi were printing calendars mario used 2 1/2 ink cartridges while luigi used 1 3/4 ink cartridges .how many more ink cartridges did mario use than luigi

Carmen and matt are conducting different chemistry experiments in school. in both experiments, each student starts with an initial amount of water in a flask. they combine two chemicals which react to produce more water. carmen's experiment starts with 30 milliliters of water in a flask, and the water increases in volume by 8.5 milliliters per second. matt's experiment starts with 10 milliliters of water and increases in volume by 28% each second.