Please answer these and show all work:

A cardboard box manufacturer wishes to make open boxes O 0in from 12 in by 12 in. pieces of cardboard by cutting equal squares from each comer and turning up the sides. What is O 2 in the length of the side of the square cutout that would give O 6 in the box the largest possible volume? O 128 in. 2) Evaluate r vl - r dr. O 8 +c O 3 8 (1-23) 43 +c O -2/3 + c O - t's (1- 23) 43 + c