Leticia charges 8$ per hour to babysit. she babysat friday night for 4 hours ,and then she babysat again on saturday. she earned a total of 72$.how many hours did leticia babysit on saturday ?

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?