Answer to three friends each create 4 bags of starter bread dough. after ten days, each of those four bags is then divided into four more bags of dough. how many days pass before 192 bags of dough are created

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?