Rudolpho takes 12 minutes to run 6 times around a 400-meter track.
assuming he runs at a constant speed, how long does he take to run
1 kilometer?

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.