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Find the area of the triangle shown 3 by 6

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 area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²