Joey went to the top of a mountain which was 20000 feet above sea level. Then Joey tripped and fell into the ocean and hit the bottom of the ocean at 3000 feet below sea level. What was the difference between the mountain and the bottom of the ocean?

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.