Fill in the blank with the correct inequality symbol

Which is the completely factored from of xy^3-x^3y

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

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.