We will have an absolute maximum (or minimum) at provided f(c) is the largest (or smallest) value that the function will ever take on the domain that we are working on. Also, when we say the âdomain we are working onâ this simply means the range of xâs that we have chosen to work with for a given problem.
Thompson's slope is about one percent, so each structure manages a zone of about nine acres. At $500 to $2,000 per structure, the drainage water management structures only added about five to 15 percent to the cost of upgrading the field's century-old drainage system.t $500 to $2,000 per structure, the drainage water management structures only added about five to 15 percent to the cost of upgrading the field's century-old drainage system.
1 Shallow French drains costs $ 10 to $16 per linear foot. 2  A Deep French drain, however, costs $12,000 for a 1,500-square foot basement 6 feet deep, and $4,000 for a crawl space with footings 2 feet deep.ips to know: 1  The cost of French Drain is determined by linear feet round the boundary of the basement. 2  A shallow French drain is suitable in areas where surface water is always soggy or keeps rushing across it. 3  A shallow drain is usually two feet deep and 1.5 feet across.