What value is the 9s in 299?

If there were no system of checks and balance,the process of government would eventually fall apart. do you agree with this opinion? why or why not?

What period of history refers to the time when people did not have written records

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.