1. The problem statement, all variables and given/known data Two related type of questions: 1) A rectangular prismic net enclosure for practising golf shots is open at one end. Find the dimensions that will minimize the amount of netting needed and give a volume of 144 m3. Netting is only required on the sides, top, and the far end. Height is x, width is also x, and length is y. 2) A rectangular piece of land is to be fenced using two kinds of fencing. Two opposite sides will be fenced using $6/m fencing, while the other two sided will require $9/m fencing. What are the dimensions of the rectangular lot of greatest area that can be fenced for a cost of $9000? 2. Relevant equations A'(x) = 0 for max/min 3. The attempt at a solution In both questions, I don't know what to do with the 144m3 or the $9000. What equations am I supposed to use? I could also use tips on how to make equations for these types of questions.