When Roscoe makes a mistake on a math problem in class, his…

When Roscoe makes a mistake on a math problem in class, his teacher chides him and derides him, thinking that punishment will make him work harder and get the problem right next time. Instead, Roscoe is in a steady downward spiral, failing math and hating school. What could you tell Roscoe’s teacher about the effectiveness of her punishment strategy?

Based on the above table and graph, Elizabeth’s opportunity…

Based on the above table and graph, Elizabeth’s opportunity cost for additional 20 apples from A (0 apples, 20 breads) to C (20 apples, 0 breads) is 20 breads. Elizabeth’s opportunity cost for 1 bread is 1 apple. Elizabeth’s opportunity cost for 1 apple is ______.