Sheldon invests $15,000 in an account earning 3% interest, compounded annually for 12 years. seven years after sheldon's initial investment, howard invests $15,000 in an account earning 6% interest, compounded annually for 5 years. given that no additional deposits are made, compare the balances of the two accounts after the interest period ends for each account. (round to the nearest dollar)

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

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.

The pet store currently has 30 hermit crabs. over the weekend they sold 15 hermit crabs. what was the inventory before the weekend's sales?