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.
Numbers can be grouped into 4 types or levels: nominal, ordinal, interval, and ratio. Nominal is the most simple, and ratio the most sophisticated. Each level possesses the characteristics of the preceding level, plus an additional quality. Nominal is hardly measurement.