Can anyone help me pls

What is the absolute value of the complex number -4-sqrt2i

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

Write 5 in the form of a/b using integers to show it as a rational number