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June 6th, 2012, 08:52 PM  #1 
Newbie Joined: Jun 2012 Posts: 20 Thanks: 0  Landscaping Problem
Problem: A drip irrigation system is installed around a circular flower garden that is 4ft in diameter. If the irrigation system costs $5.46 per foot, find the cost to place the irrigation system around the flower garden. Use 3.14 for pie First thing i did was figure out the distance around which is 12.56 then i times the cost but apparently i am doing it wrong. Can anyone explain this to me? 
June 6th, 2012, 09:04 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,155 Thanks: 463 Math Focus: Calculus/ODEs  Re: Landscaping Problem
Sounds like you are doing it correctly to me. You used circumference is pi·diameter = 3.14·4 ft = 12.56 ft, then total cost is (12.56 ft)($5.46/ft) ? $68.58 Is that the result you came to? 
June 6th, 2012, 09:08 PM  #3 
Newbie Joined: Jun 2012 Posts: 20 Thanks: 0  Re: Landscaping Problem
Yes i did! it turns out my instructor made a mistake on her part thank you!

June 6th, 2012, 09:13 PM  #4 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,155 Thanks: 463 Math Focus: Calculus/ODEs  Re: Landscaping Problem
Glad to help, and welcome to the forum! 
June 7th, 2012, 02:12 AM  #5 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 10,688 Thanks: 701  Re: Landscaping Problem
Remove "donot" from your name 