Answer:
28 units³
Step-by-step explanation:
The volume (V) of the prism is calculated as
V = Al ( A is the area of end face and l is the length )
Here A = and l = , thus
V = × ( cancel 21 and 3 by 3 and 2 and 8 by 2 )
= × = 7 × 4 = 28 units³
c
I'm pretty sure the answer is D