HELP Please with EASY Pre Calc problem finding the dimensions for this box I'm so

Layla Sarah A

New member
stuck?!? I know its easy but I don't get it!! Please solve and explain
A box having a square base and an open top is to contain 102 cubic feet. What should its dimensions be so that the material to make it minimum? That is, what dimensions will cost the least



Also what is the form P=P0a^t ??? How do I plug it in for years and # of passengers in millions? Thank you!
 
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