The height of an object is represented by the function h(t) = 400 - 16t2, where 400 represents the initial height in feet from which the object is dropped and 1 represents the elapsed time in seconds. How many seconds will it take for the object to hit the ground?
O 20 seconds

This is so hard and it’s for a test

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

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.