It takes carla 8 minutes to shower, 20 minutes to get dressed and 15 minutes to eat breakfast before leaving for school. how long does it take carla to get ready for school?

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss, how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.