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[check my work ] A cylindrical container, with a volume of 4000cm³ is being constructed to build candies. The cost of the base and lid is $0.005/cm², and the cost of the side walls is $0.0025/cm². Determine the dimensions of the cheapest possible container. Okay so I finished the problem and got the right radius but i'm having problems finding the height !

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1 Attachment
whys ur handwriting so neat..
its hard to read that scan tho

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Other answers:

lets just go over the steps
tell me what you wrote for your surface area equation and volume equation
minizmine cost*
either way u do same functioon lol
is this what u did?
u can rewrite h as a function of r or r as a function of h and substitute into 2nd equation and take the derivative solve for the critical points, and see what dimensions minimize cost
ill post a better picture cause i have the whole question finished
just that last step is missing
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I don't know what the above discussion is going into, but if you have found out the radius, just substitute the value in pi*r^2*h = 4000 since the volume of cylinder is given by pi*r^2*h...
yes looks right
i checked ur first few steps its right upto there
mhm but then i have to find h
i'm not gettingg the right value for h
@ dan815 |dw:1371790110621:dw| It should be 2 times- one for lid and one for base...

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