Which expression can be simplified as 1/n^18

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b. false

The number 72 lies between what perfect squares

The box plots show the data distributions for the number of customers who used a coupon each hour for two days of a store sale. what is the difference of the medians?