during the quarantine periodd merlyn has been helping her mother in the kitchen in cooking thier meals while cooking she founnd out that there are 1/15 kg of salt found in the container her mother useed 1/4 of it which she was preparing dinner how much ssalt did her mother use?

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?