At the beginning of the year, jason had $80 his savings account. each month, he added $15 to his account. write an expression for the amount of money in jason's savings account each month. then use the expression to find the amount of money in his account at the end of the year.

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?