Bài 256 ạ , mọi người giúp mình với ♥️♥️♥️♥️

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Carlos spent 1 1/4 hours doing his math homework he spent 1/4 of his time practicing his multiplication facts how many hours to carlos been practicing his multiplication facts