Help a girl out pls 30 points for helping!!

The parabola opens: y=√x-4 (principal square root) up down right left

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 ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Which of the following is the result of expanding