Answer:
[tex]V=4x^3-30x^2+54x[/tex]
Step-by-step explanation:
From the question we are told that
Breath of cardboard h=6
Length of cardboard l=9
Let x be the height when fold
Generally the new rectangle is mathematically given as
Breath [tex]h'=(6-2x)[/tex]
Length [tex]l'=(9-2x)[/tex]
Generally the Volume of tray is mathematically given as
[tex]V=L*B*H[/tex]
[tex]V=(9-2x)*6-2x*x[/tex]
[tex]V=x(4x^2-30x+54)[/tex]
[tex]V=4x^3-30x^2+54x[/tex]