Answer:
Step-by-step explanation:
Given
Volume of box 
Let b be the square base and h be the height of box
Volume 

Surface Area 


Differentiate A w.r.t b to get maxima/minima





![[tex]h=\frac{32,000}{40\times 40}](https://tex.z-dn.net/?f=%5Btex%5Dh%3D%5Cfrac%7B32%2C000%7D%7B40%5Ctimes%2040%7D)

Approximately 22.360679775
The unit rate for 3 for $5 is around $1.70 or $1.60
The unit rate for 4 for $6 is $1.50
So for the left side put
0,30,60,150,240,330,1470
sorry but I only no the left side I hope that helps(:(:(:(:
Y(3y-4)
The y can be factored out of both equations