Final answer:
The volume of the oblique prism can be calculated by multiplying the base area by the height of the prism.
Step-by-step explanation:
The volume of an oblique prism can be calculated by multiplying the area of its base by its height. In this case, the base area is given as 3x2 square units, and the height of the prism is 13 units. Therefore, the expression that represents the volume of the prism is 3x2 * 13 = 39x2 cubic units.