1.A dam impounds a river to create a reservoir. The width of the dam is 75 m and 150 m long. The depth of the water in the reservoir is 30 m above the original river. A certain amount of dry weather groundwater flow occurs through the dam generating a stream of 5 m depth and a flow of 20 m^3/s. Calculate the hydraulic conductivity of the dam soil?
2.Find a recurrence relation for the number of ways to go n miles by fast walking at 2 miles per hour or jogging at 4 miles per hour or running at 8 miles per hour; at the end of each hour a choice is made of how to go the next hour.
How many ways are there to go 12 miles?