Carbon-11 is used in medical imaging. The half-life of this radioisotope is 20. 4 min. What percentage of a sample remains after 50. 0 min?.

Which of these international trade concepts results in specialization and trade increases in total world output? a) absolute advantage b) balance of payments c) absolute advantage d) international tariffs

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.

Registrars maintain high a. standardized tests b. faculty payrolls c. transcripts d. sporting facilities