Ken and Joe are out at a bar drinking. During the evening, Ken writes a note on a cocktail napkin agreeing to sell his car to Joe for $500. After they both sign it, Ken pockets the money and hands the keys over. The next day, Ken has no idea where his car is and how he came to have $500 in his wallet. Was this a valid contract?

Bakery has bought 250 pounds of muffin dough. they want to make waffles or muffins in half-dozen packs out of it. half a dozen of muffins requires 1 lb of dough and a pack of waffles uses 3/4 lb of dough. it take bakers 6 minutes to make a half-dozen of waffles and 3 minutes to make a half-dozen of muffins. their profit will be $1.50 on each pack of waffles and $2.00 on each pack of muffins. how many of each should they make to maximize profit, if they have just 20 hours to do everything?