Probem32+Hannah+N.Zach+F.

But the problem doesn't say that the //printed// area is 180; it says that the total area of the poster is 180, of which the borders are a part. You will need to fix this! I believe that your calculus is good (but you will get a different answer when you change your equation). Also, the only thing you have shown here is that (according to your work) you have a critical value at w = 13.416. How do we know that there is an absolute extrema at this point?