max and Min of Functions in Word Problems

hopelynnwelch

Junior Member
Joined
Jan 16, 2015
Messages
60
I have this problem. I have figured most of it out, but I am not sure what the last part is asking or know how to find it.

MAXMIN.JPG

I have:

x^2y=132
y=132/x^2
A=x^2+4xy
A=x^2+528/x
A'=2x-528/x^2
2x-528/x^2=0 x=6.42

I have got this far. Any tips on the last piece? What do they even want?
 
I have this problem. I have figured most of it out, but I am not sure what the last part is asking or know how to find it.

View attachment 5035

I have:

x^2y=132
y=132/x^2
A=x^2+4xy
A=x^2+528/x
A'=2x-528/x^2
2x-528/x^2=0 x=6.42

I have got this far. Any tips on the last piece? What do they even want?
They want the dmension of the box which is the length, width and height. They want y! You know that y=132/x^2 and you know what x is. Go find y.
 
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