I think this is what your looking for
According to Cattell, there are two types of intelligence; fluid intelligence and crystallized intelligence. Crystallized intelligence is the ability to use experience and learned knowledge. Fluid intelligence is the ability to solve new problems, use logic, and identify patterns.
Currency exchange is:
Used for trade.
International trade, or the buying and selling of goods and services between different countries, must be seen as “fair” by both nations. A fair currency exchange rate is determined by world supply and demand.
Circumference formula is
. Since it decreases by 2 inches,
and r=1.146 and the diameter is
.
