Evaluate the following expression using the values given:

find −a2 − 3b3 + c2 + 2b3 − c2 if a = 3, b = 2, and c = −3.

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