According to Rolle's Theorem, the rate of change of the cost must be 0 for some order size in the interval (2, 15). Find that order size. (Round your answer to the nearest whole number.)

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.