June 6th, 2014, 10:47 AM  #1 
Newbie Joined: Jun 2014 From: Belo Horizonte Posts: 5 Thanks: 0  Minimum of a function?
A drilling 12 miles off the coast will be connected to a coastal refinery, 20 miles below the perforation line. The underwater pipeline cost $ $50.000 per mile. Whereas the land, cost $30.000 per mile. What is the combination of the two types of products that will provide the least expensive connection?
Last edited by condemath2; June 6th, 2014 at 10:51 AM. 
June 6th, 2014, 05:13 PM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,671 Thanks: 2651 Math Focus: Mainly analysis and algebra 
Do a search for "pipeline" in the forum. There's a few threads with puzzles like this.


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