Question 1197882
--------------------------------------------------------------------
1. if we let w be the width and 1 be the length, what is the expression for the sum of the measures of the three sides of the parking lot?
--------------------------------------------------------------------


Something is not well chosen.


If w is the size of the two opposite wire fence sides, then the other dimension is 20-2w.


Area of enclosed region is  {{{w(20-2w)}}}.


A for area
{{{A=20w-2w^2}}}


The zeros for A are at  w=0  and  at 20-2w=0 or 10-w=0  or  w=10,
So the maximum for A would be exactly in the middle:  or at {{{highlight(w=5)}}}



Maybe you can work with the rest.
.
.