What’s the answer thx

Which of the following is the correct ratio for converting kilograms to grams

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

What is the value of f(x) = 2.2 for f(-2)?