A biologist has found that the number of branches on a certain rare tree in its first few years of life can be modeled by the polynomial
b(y) = 4y^2 + y. The number of leaves on each branch can be modeled
by the polynomial /(y)= 2y + 3y² + y, where y is the number of years
after the tree reaches a height of 6 feet. Write a polynomial describing
the total number of leaves on the tree.

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.