The area of a circle is 36π square units. how many units long is its radius? (use only the digits 0 - 9 and the decimal point, if needed, to write the answer.)

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