The area of a rectangle is 54x^9y^8 square yards. If the length of the rectangle is 6x^3y^4 which expression represents the width of the rectangle in yards?

To find the width of the rectangle, we need to divide the area by the length:

Width = Area / Length
Width = 54x^9y^8 / 6x^3y^4
Width = 9x^6y^4

Therefore, the width of the rectangle is 9x^6y^4 yards.