Pineapples are on sale for $2 each, but customers can buy no more than 5 at
this price.
for pineapples bought at the sale price, the total cost, y, is directly
proportional to the number bought, x. this function can be modeled by y = 2x.
what is the domain of the function in this situation?

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?