Need help with math!! Provided the graph with answers

Which function is represented by the graph

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

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.