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Answer A seems to make the most sense to me<span />
Answer:
30 square millimeters
Step-by-step explanation:
3 x 3 = 9
3 x 1 = 3
there are two sides with the area 9 therefore...
9 x 2 = 18
There are four sides with the area 3 therefore...
3 x 4 = 12
Therefore the suface area is
12 + 18 = 30
Differentiating once, we have
Differentiating again,
as needed.
Answer:
HI HI from the UK,
Step-by-step explanation: