Owen and maya each studied for a test Owen Siri for 90 minutes and Maya studied for 0.5 times the length of time who studied more multiply to check your prediction

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.