This paper summarizes important points from Why Don’t ...

is no such thing as a free lunch because everything involves a cost, even if it. is just a time cost. Difficulty: M Type: D. Kathy and Amy paint pictures and do caricatures to sell to tourists. In one day, Kathy can either paint two pictures or do four caricatures. In one day, Amy can either paint three pictures or do three caricatures. ................
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