How many triangles have at least two acute angles

What is the product of the radical expression. (7-2square root) (8+2 square root)

I'll give brainliest if you answer right : )

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