What is the value of the expression 0.5 power 2

Answer this question only if you know the 30 points and

What could explain what happened when the time was equal to 120 minutes

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