Question 1197412
Follow along exactly how the description is written.  


w and w+4


{{{w(w+4)>=25}}}


{{{w^2+4w-25>=0}}}


critical w values
w,  {{{(-4+- sqrt(16+4*25))/2}}}

{{{(-4+- sqrt(116))/2}}}

{{{-2+- sqrt(4+25)}}}

{{{-2+sqrt(29)}}}----------width w must be this value or larger.