$\"\"$

The find out length:

Area of the rectangle is $\"\"$ where l is the length and w is the width.

$\"\"$ (Substitute A = 468 and w = 12)

$\"\"$ (Divide each side by 12)

$\"\"$ (Cancel common terms)

$\"\"$ ft (Divide: $\"\"$ ) \ \ $\"\"$

The length of the rectangle $\"\"$ ft.