Help! I need this for math rn. please answer!

How do you find principle and simple interest

How to use order of operation in 20 divide by 4 multiply 5 = 1

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