Which of the following is important to do when planning an experiment? (1 point) Make sure that your friends will be there when you do the experiment.

Make sure that the experiment is safe to conduct.

Make sure that nobody else can copy the experiment.

Make sure that you don't know what the experiment is testing.

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.