emietta decides to ham 768 new magic spells before her exam. She pLans I am the same number each thy. In the first five days, she learns exactly the number of spells she planned to learn. In the remaining days before her exam, Hemietta lean. 6 more magic spells each day than planned. When she still had I day left before the exam, Henrietta calculated that she learned 844 new magic spells. How many spells did Henrietta plan to team each day?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than 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?