3. A farmer wants to make a rectangular pen that encloses a total area of 216 square feet. He wants 2 pens of equal size inside the rectangular pen as shown. Find the dimensions of the outside rectangular pen and the minimum amount of fencing needed. y X X y X A rancher wants to create two rectangular pens, as shown in the figure, using an existing fence line as one side. The pens need to have a total area of 5,043 square feet. What dimensions should be used to minimize the amount of fence used? fence line y -/2 points My Notes +Ask Your Teacher Bob wants to create two pens, as shown in the figure. One pen if for a garden and it needs a heavy duty fence to keep out the critters. This heavy duty fence costs $24 per foot. The dog pen shares a side with the garden and has a lighter weight fence on the other three sides that costs $6 per foot. If each pen is to have an area of 3,240, find the values of x and y that would minimize the total cost of the fencing. X ft (smaller value) dog pen ft (larger value) garden