When your brother takes the SAT test, his results say that his math score is the 78%. Your brother knows that you are taking a stats class and asks you what this means. Explain, carefully and precisely, what this means.

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?