[JMO 2012 A8] An athletics club has junior (i. e. boy or girl) members and
adult members. The ratio of girls to
boys to adults is 3:4:9 and there
are 16 more adult members than
junior members. In total, how many
members does the club have?

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

What is the x-intercept and y-intercept of the equation 2x+1. 2o

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.