Oil Rig Oil Pipeline Land Water 16 Miles Refinery An Oil Rig is located a 8 miles from a straight coastline. An Oil Refinery is located 16 miles down the coastline. The cost of putting in a pipeline from the Oil Rig to the Oil Refinery depends on whether it is on land or in the water. Rather than coming directly to the shoreline and then turning at a Right Angle, suppose that the Oil Pipeline met the shore at a point b = 4 miles from the "Right Angle". If the cost is $8000 per mile for land and $15000 per mile for water, what is the cost of the Pipeline?