1.
Answer: 300 cubic inches
Step-by-step explanation:
You have split the shape correctly.
top one:
8 x 3 x 5 = 120
Bottom one:
12 x 3 x 5 = 180
120+180 = 300
2.
Answer: A=5, B=4; volume = 88 cubic feet
Somewhat of a Step-by-step explanation:
A: 8 - 3 = 5
B: 8-4 = 4
Volume: 88 cubic feet
(2x3x4) + (2x8x4) = 88
Hope this helps!! This might not make sense, but it's hard to explain these things via text
