Find the difference between 4/9 and -5/9

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%

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.