Unit of measurement . a punk/disco band , was signed up to play a benefit concert for new year's eve. they started at 6: 00 pm on new years eve and managed to play until 9: 00 am in the morning of janurary 2. interestingly , they are paid by the minute so they need to know how long they played in minutes. which type of problem best expemplifies this question? . a. order of magnitude . b. unit conversion. c. significant figures. d. estimation

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?