Alex wants to have $3000 in his bank account after 4 years. if the account earns 6% interest compounded 2 times per year, how much should he put in? round to the nearest cent. a. $2863.32 b. $2238.36 c. $2633.82 d. $2368.23

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?