7th grade math, need some help.

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

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.