Tangible refers to things we can see and feel whereas intangible are things that cannot be seen or felt. Let us understand this by an example. Suppose the cost of doing an MBA course from a top business schools is $100000 while the cost of a low rung school is $50000.
Economists use complex numbers in order to make profit predictions. When analyzing business cycles, complex numbers can also come into play. Complex numbers may also help an economist trying to determine the internal rate of return, such as the yield on a bond, or an economic duration.
The other classifications of numbers include: 1  Integers-similar to whole numbers, but they also include negative numbers. 2  Like natural and whole numbers, they do not have any fraction or decimal part. 3  Rational number-refers to the quotient of two integers with a nonzero denominator.