help! please look at the picture, the answer is needed quick the explanation doesn't matter. Thanks!

In the rectangle below ac=30 units what is de

Im literally having a mental breakdown

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