How many parts are there in the format of a two-column proof?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

According to the data set, where should the upper quartile line of the box plot be placed?

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%