What are 3 ways you can write 3 divided by x?

What is the missing constant term in the perfect square that starts with x^2 -20x

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

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%