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September 20, 2014

September 20, 2014

Posted by **joemarie** on Thursday, November 7, 2013 at 7:32pm.

- math -
**Reiny**, Thursday, November 7, 2013 at 8:52pmwidth of each rectangle = x

length of each rectangle = x+1

sum of area = 2x(x+1) = 2x^2 + 2x

d(area)/dx = 4x + 2

= 0 for a max/min

4x + 2 = 0

4x = -2

x = -1/2

also 2(2x + 2(x+1)) = 36

4x + 4x + 4 = 36

8x=32

x=4

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