80% of the 6th graders at harrison middle are going on a field trip to the museum there are a total of 685 students in 6th grade how many students are going on the field trip

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

According to the data set, where should the upper quartile line of the box plot be placed?

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?