Question 1080858
Picture Only, {{{8*12}}} inches^2


Picture and Frame {{{(8+2w)(12+2w)}}}


Frame Area only  {{{(8+2w)(12+2w)-8*12}}}
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{{{8*12+24w+16w+4w^2-8*12}}}
{{{40w+4w^2}}}
{{{highlight(A[f](w)=4w^2+40w)}}}-----function, area just the frame


Domain, {{{w>=0}}}


Last question:  Let A(w)=224 and solve for w.