Asocial scientist conducts a study with 10 subjects. in which situations is a permutation necessary to determine the number of possible outcomes ?
select all that apply
a) schedule interviews for all 10 subjects
b) invite 3 subjects to participate in a repeat study
c) select 3 out of 6 sandwiches and 2 out of 4 desserts for the subjects lunches
d) create a seating chart for 10 subjects around a table
e) administer a survey to 6 of the subjects

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

True or false? a circle could be circumscribed about the quadrilateral below.

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.