?????????? "find dimenshuns" ??????...yu wanna no how big????
???????? printing area ????????? yu wanna maximize area inside the borders????
1. rektangel with area=6912 , so leng*wide=6912, or wide=6912/leng
2. top & bottom border=6
3. side border=8
inside area=(leng-16)*(wide -12)
=(leng-16)*[(6912/leng)-12]
=6912 +(12*16)-12*leng -(16*6912)/leng
=6912 +192 -12*leng -110592/leng
d(area)/dx=-12 -110592*(-1)*leng^-2
max area wen slope=0, so -12 +110592*leng-2=0
or -12 leng^2 +110592=0
or leng^2=110,592/12=9216
leng=root(9216)=96
wide=area/leng=6912/96=72