I need help with 40 and 39!!!

Answer:
39) Opt. A (24)
Step-by-step explanation:
39) 40 - 8(n) where n = 2
=> 40 - 8*2
=> 40 - 16
=> 24 Opt. A
And just for information, the answer you marked for 38th is wrong.
Formula = bh/2
b = 16
h = 12
bh/2 = 16*12/2
=192/2 = 96
Hope this helps u
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