Which of the following statements is true when considering central banks? A.
Every nation in the world has a central bank that influences the world's economy.
B.
The first central bank was the Bank of England, established by Parliament in 1694.
C.
The number of central banks in the world grew enormously after the Great Depression.
D.
Central banks are a relatively new phenomena, appearing after the end of World War II.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends > a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?