The length is 12, because if it's 9 inches wide it has two sides of 9 inches which is 18. Then subtract that from the intial value 42 to get 24. After, you divide 24 by 2 due to there being 2 sides of the box and 24 is the sum of both sides. Hopethis helps!
This is True! To have a secure bank is what everyone wants because if you don't have a secure bank there are numerous amounts of things that can happen to you money.
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Step-by-step explanation: to be honest i do not know
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4
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