The volume of a rectangular prism is given by:
V=lwh

Substituting the given dimensions, we have V=4(2x+1)(4.5)

V=(8x+4)(4.5)

V=36x+18

The volume is no more than 36 cubic units which means that it is less than or equal to 36 cubic units: 36x+18<=36

Substituting the given dimensions, we have V=4(2x+1)(4.5)

V=(8x+4)(4.5)

V=36x+18

The volume is no more than 36 cubic units which means that it is less than or equal to 36 cubic units: 36x+18<=36