Karl needs to build a stage it has an area 72 ft.² the length of the stage be longer than the width what are the possible whole number measurements for the length and the width of the stage

This will include all of the factors that can be multiplied together to total 72 because area of a rectangle is L x W.
1 x 72 = 72  1 and 72 are factors
2 x 36 = 72   2 and 36
3 x ? = 72
Include all of the numbers that you can find that equal 72 when multiplied together.  These will fulfill the formula L x W which is area of a rectangle.