Researchers are measuring the number of days lettuce seeds take to germinate. The box-and-whisker plot summarizes the data. What can you conclude from the box-and-whisker plot?

a) 25% of the seeds took more than 6 days to germinate.

b) 25% of the seeds took less than 5 days to germinate.

c) 50% of the seeds took more than 8 days to germinate.

d) The median number of days for the seeds to germinate was 3.

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?