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The notion of doubling time dates to interest on loans in Babylonian mathematics. Clay tablets from circa 2000 BCE include the exercise "Given an interest rate of 1/60 per month (no compounding), come the doubling time." This yields an annual interest rate of 12/60 = 20%, and hence a doubling time of 100% growth/20% growth per year = 5 years.
The doubling time (t d) of a population is the time required for the population to grow to twice its size. [24] We can calculate the doubling time of a geometric population using the equation: N t = λ t N 0 by exploiting our knowledge of the fact that the population (N) is twice its size (2N) after the doubling time. [20]
The national 1 July, mid-year population estimates (usually based on past national censuses) supplied in these tables are given in thousands. The retrospective figures use the present-day names and world political division: for example, the table gives data for each of the 15 republics of the former Soviet Union, as if they had already been independent in 1950.
Foreign population in the Czech Republic in 2020. According to the Czech Statistical Office as of 31 December 2020 there were 632,570 legal foreign residents in the Czech Republic (5.1% of the total population). [33] Residents from Ukraine are the largest group (165,356), followed by residents of Slovakia (124,544). There are also Asian ...
The formula above can be used for more than calculating the doubling time. If one wants to know the tripling time, for example, replace the constant 2 in the numerator with 3. As another example, if one wants to know the number of periods it takes for the initial value to rise by 50%, replace the constant 2 with 1.5.
This is a list of urban areas in the Czech Republic. There are 3 metropolitan areas and 10 agglomerations. There are 3 metropolitan areas and 10 agglomerations. The populations of the urban areas are calculated by combining all of their municipalities' latest populations, as the last available population data was from 2019.
In the study of age-structured population growth, probably one of the most important equations is the Euler–Lotka equation.Based on the age demographic of females in the population and female births (since in many cases it is the females that are more limited in the ability to reproduce), this equation allows for an estimation of how a population is growing.
The Prague metropolitan area (Czech: Pražská metropolitní oblast) is the metropolitan area of Prague, the capital city of the Czech Republic. The population is 2,264,690 as of 2024. [ 1 ] It is the most populous metropolitan area in the country.