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Sq Ft 25

January 20th, 2007

Sq Ft 25
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100 sq ft Commercial Rubber Gym Flooring 4 x 25 ft Mat Firestorm Red
100 sq ft Commercial Rubber Gym Flooring 4 x 25 ft Mat Firestorm Red
Paypal   US $210.00
Cap Barbell Solid Hex Single Dumbbell 80 Pounds
Cap Barbell Solid Hex Single Dumbbell 80 Pounds
Paypal   US $11.50
CAP Barbell Regular Grey Weight Set Weights Bars Collars TADD
CAP Barbell Regular Grey Weight Set Weights Bars Collars TADD
Paypal   US $10.50
100 sq ft Commercial Rubber Gym Flooring 4 x 25 ft Mat
100 sq ft Commercial Rubber Gym Flooring 4 x 25 ft Mat
Paypal   US $200.00
100 sq ft Commercial Rubber Gym Flooring 4 x 25 ft Mat 20 Brick Red
100 sq ft Commercial Rubber Gym Flooring 4 x 25 ft Mat 20 Brick Red
Paypal   US $210.00
Pair of USA Sports Solid 25 lb Hex Dumbbells
Pair of USA Sports Solid 25 lb Hex Dumbbells
   US $95.71
Bowflex SelectTech 1090 Adjustable Dumbbell Single PARTS ONLY
Bowflex SelectTech 1090 Adjustable Dumbbell Single PARTS ONLY
Paypal   US $.99

Sq Ft 25
Finding minimum cost for 3000 sq foot garden?

3000 sq ft rectangle. 3 sides enclosed with $25/foot shrubs and 1 side enclosed with $10/foot fence. Find the minimal total cost. I have no idea where to even begin. Optimization problems are the bane of my existence.

X and Y
XY = 3000
cost = 2 * 25 * X + 25 Y + 10 Y = 50X + 35Y
X = 3000/Y
cost = 50 * 3000/Y + 35Y
dc/dY = 35 - 150000/Y^2 = 0
Y = sqrt (150000/35) = 65.5
X = 45.8
cost = 4583.79

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