A smart phone manufacturer wants to determine the average battery time that it’s new smart phone will get. The manufacturer will test 100 smart phones. Match the strategy to their corresponding sampling techniques

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Factor the expression using gcf 9b+45

Which best describes a central bank's primary goals? limiting inflation and reducing unemployment reducing unemployment and maintaining cash flow controlling stagflation and reducing unemployment managing credit and ensuring the money supply's liquidity