The selling price of an item is ​$520. It is marked down by ​10%, but this sale price is still marked up from the cost of ​360$. Find the markup from cost to sale price.

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.