Damien McCoy has loaned money to his brother at an interest rate of 5.85 percent. He expects to receive $987, $1,012, $1,062, and $1,162 at the end of the next four years as complete repayment of the loan with interest. How much did he loan out to his brother? (Round to the nearest dollar.)
Damien McCoy has loaned money to his brother at an

a.$3,657
b.$3,685
c.$3,785
d.$3,757

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?