Find the point of diminishing returns left parenthesis x comma y right parenthesis(x, y) for the function R(x), where R(x) represents revenue (in thousands of dollars) and x represents the amount spent on advertising (in thousands of dollars).

R(x) 10,000-x +33x +800x, 0 sxs20

The point of diminishing returns is (Type an ordered pair.)

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.