12. A rectangular section of a field is to be fenced. Because one side of the field is bordered by a creek, only 3 sides need to be fenced. The fenced section should have an area of 60 m. Determine the minimum perimeter and dimensions of the fenced area in each case: a) The dimensions must be whole numbers of metres. b) The dimensions can be decimal lengths. 60 m 6. A farmer has 400 feet of fencing. Determine the greatest rectangular area that he can enclose with the fencing. 7. At an outdoor festival, 2-m sections of fencing are used to enclose an area for food sales. There are 100 sections of fencing available. a) How many metres of fencing are available altogether? b) Determine the maximum rectangular area that could be enclosed. How does the fact that the fencing is in sections affect your answer?