If tom and abby specialize and then trade balls and rackets at 15 balls per 1
a. tom gains 10 balls while abby gains 1 racket and 15 balls an hour
b. tom gains 10 balls and abby gains 10 balls an hour
c. together they gain 80 balls and 4 rackets an hour
d. tom gains 2 rackets while abby gains 40 balls an hour
e. tom gains 1 racket and 15 balls while abby gains 10 balls an hour
  

Write the pair of fractions as a pair of fractions with a common denominator

Which of the following parabolas opens down?

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.