Aclub swimming pool is 29 ft wide and 43 ft long. the club members want an exposed aggregate border in a strip of uniform width around the pool. they have enough material for 820 ft^2. how wide can the strip be

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?