The base is an 8 by 8 cubic inch square. 409.6/6.4= 64, and the square of 64 is 8.
NOT
the election of a democratic leader in the Arab state of Tunisia.
MAYBE
the adoption of a democratic-leaning constitution in Libya.
The countries currently on stage 4 of demographic transition model are.. Argentina, Australia, Canada, China, Brazil, Singapore, South Korea, U.S. , and most of Europe.
Abundant most likely means: more than sufficient without being excessive. plentiful implies a great or rich supply.