Answer: 416 mm³
Step-by-step explanation: To find the volume of the prism shown here, start with the formula for the volume of a prism which is shown below.
Volume = length × width × height
Here, notice that our prism has a length of 10.4 millimeters, a width of 5 millimeters, and a height of 8 millimeters.
So we have (10.4 mm)(5 mm)(8 mm).
(10.4 mm)(5 mm) is 52 mm² and (55 mm²)(8 mm) is 416 mm³.
So the volume of the prism shown here is 416 mm³.