What are the dimensions of the largest rectangle that can be drawn in the closed region bounded by the x- and y-axes and the graph of the function y = 8 - x3 A=lw=16 D= 2l + 2w = 2l + 16/l I started off by graphing the equation. The y-int was 8 and the x-int was 2. Thus, I established that the total area bound by the axes was 16. Afterwards, I found the stationary points of D: D'=2-32/l2 D''=-64/l2 The stationary point was four and thus as D'' was a negative, D is a maximum. L=4 and thus w=4 and the total dimensions were 16. However, this was wrong, the answer was 15. I think I may have interpreted the question incorrectly but could someone please point out my error? Thank you.