06: What is a 2/3 majority in both houses of
Congress?

here look

Explanation:

Federal government

Congress may pass bills by simple majority votes. If the president vetoes a bill, Congress may override the veto by a two-thirds supermajority of both houses.

alaska is the answer to this

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories