Sally makes deposits into a retirement account every year from the age of 30 until she retires at age 65. a) if sally deposits $ 1000 per year and the account earns interest at a rate of 7 % per year, compounded annually, how much does she have in the account when she retires? b) how much of that total amount is from sally's deposits? how much is interest?

What do you think: would it be more profitable to own 200 shares of penny’s pickles or 1 share of exxon? why do you think that?

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?

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