Which of the following is an exampke of thinking at the margin ? Deciding whether the benefit of working two extra hours per day is worth the sacrifice of study time

Which examples are relevant sources for students to use in research? check all that apply. a journal entry written by a professor who is considered an expert a report written by an independent government source a presentation by a company that includes paid information a document published by a renowned organization a scientific paper put out by a non-profit organization a blog whose author tries to sell a product or service