Question I’m ten and I’m homeschooled I don’t know what grade I’m supposed to be in so I was wondering if you knew?

Based on the figures as marked, /\rqs = —

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?