Astudy was done on the timeliness of flights (on-time vs. delayed) of two major airlines: statsair and airmedian. data were collected over a period of time from five major cities and it was found that statsair does better overall (i. e., has a smaller percentage of delayed flights). however, in each of the five cities separately, airmedian does better. which of the following is correct? (a) this situation is mathematically impossible.(b) this is an example of simpson's paradox.(c) "city" is a lurking variable in this example.(d) this is an example of a negative association between variables.(e) both (b) and (c) are correct.

Hye ryung is the president of the local chapter of the american medical students association (amsa). she is organizing local outreach and informational meetings. at her first meeting there are five people present (including herself). every month after that her group grows by 5 people. a. how many members are in the group after 6 months? b. the logistics of hosting and feeding her group at meetings was more complicated than expected. the cost of feeding 5 people at her first meeting was $30, for 10 people it was $35, for 15 it was $45, and after 6 months all of the costs had added up to $100. write a function to model the cost with the number of people attending meetings. c. what connections can you make between the linear growth of the group’s membership and the increasing costs of running meetings?

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?