A car radiator holds 12 liters. How much pure antifreeze, in liters, must be added to a mixture that is 4% antifreeze to make enough of a 20% mixture to fill the radiator?

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