Question

 The population of the United States in 1998 was twice of its population in 1943.If the population of the United States in 1998 was 270 million people, then its population in 1943 was​

Answer 1

hi

This article lists current estimates of the world population in history. In summary, estimates for the progression of world population since the late medieval period are in the following ranges:

Year 1400 1500 1600 1700 1800 1900 2000 2100[1]

population

(in billions) 0.35–0.40 0.43–0.50 0.50–0.58 0.60–0.68 0.89–0.98 1.56–1.71 6.06–6.15 c. 10–13

growth p.a.[2] >0% <0.12% 0.15–0.3% 0.1–0.15% 0.3–0.5% 0.5–0.6% 1.3–1.4% 0.7–0.8%

Estimates for pre-modern times are necessarily fraught with great uncertainties, and few of the published estimates have confidence intervals; in the absence of a straightforward means to assess the error of such estimates, a rough idea of expert consensus can be gained by comparing the values given in independent publications. Population estimates cannot be considered accurate to more than two decimal digits; for example, the world population for the year 2012 was estimated at 7.02, 7.06 and 7.08 billion by the United States Census Bureau, the Population Reference Bureau and the United Nations Department of Economic and Social Affairs, respectively, corresponding to a spread of estimates of the order of 0.8%.