The wolf population in a local wildlife area is currently 12. Due to a new conservation effort, conservationists hope the wolf population will increase by 3 wolves each year for
the next 50 years. Assume that the plan will be successful. Complete the explicit rule for
the population sequence. Use the rule to predict the number of wolves in the wildlife area
in the eleventh year.
The explicit rule is f(n) = 12
+ 3
(n - 1).
The number of wolves in the wildlife area in the eleventh year is

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?