Posted by Jessica on Thursday, November 18, 2010 at 8:08pm.
a farmer has 160 ft of fence and wants a pen to adjoin to the whole side of the 130 ft barn. what should the dimensions be for maximum area?

Calculus  MathMate, Friday, November 19, 2010 at 4:35pm
If the pen has to be joined to the whole side of the barn, there goes 130 ft. He/she has only 30 ft left for the two sides. The dimensions are therefore 15 ft * 130 ft = 1950 sq.ft.
There is no calculations involving calculus, unless I have misinterpreted the question. 
Calculus  Anonymous, Tuesday, May 3, 2011 at 6:02pm
A landscape architect wished to enclose a rectangular garden on one side by a brick wall costing $30/ft and on the other three sides by a metal fence costing $20/ft. If the area of the garden is 108 square feet, find the dimensions of the garden that minimize the cost.

Calculus  Anonymous, Tuesday, May 3, 2011 at 6:03pm
A landscape architect wished to enclose a rectangular garden on one side by a brick wall costing $30/ft and on the other three sides by a metal fence costing $20/ft. If the area of the garden is 108 square feet, find the dimensions of the garden that minimize the cost.
Length of side with bricks x
Length of adjacent side y 
Calculus  Anonymous, Monday, April 2, 2012 at 10:33pm
lol