Find the area, and round to the nearest tenth

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

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%