Answer:
349.5cm^3
Explanation:
Best way to look at it is to take the volume of the whole prism ignoring that there is a missing part, then subtract the value of that missing part. so take the volume of the whole
Vb=12 x 5.5 x 6.5 = 429
volume of missing part: 5 x 3 x 5.5= 79.5
now subtract the volume of smaller one
V = 429- 79.5 = 349.5
hope this helps