Aresearcher wants to conduct a study to see if playing chess improves memory. the researcher finds 50 individuals who play chess regularly and 50 that do not. each of the 100 individuals are given a questionnaire designed to determine memory level. if the 100 individuals did not know they were participating in the study, which statement about the study is correct?
1. it is an experiment where playing chess is a blocking variable.2. it is a matched-pairs design.3. it is a randomized experiment.4. it is an observational study.5. it is a double-blind study.

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?

Miranda is braiding her hair. then she will attach beads to the braid. she wants 1_3 of the beads to be red. if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?

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