1. why did the yen carry trade work during the early 2000s?

Interest rate was almost Zero.

Explanation:

In the early 2000s, the interest rate of Japanese Yen was almost zero. That's why many Japanese businesses started to borrow Japanese Yen and started investing in the US treasury bills. In that time, the interest of the US treasury bill was 3-4%. Because of this reason, Yen Carry trade worked in the early 2000s.

mesopotamian code of hammurabi

and i think its 1860 b.c. you mean lol

the cost of college has risen faster than inflation for many years.

the high price of student services and administration are two reasons for the rapid increase in cost.