Doubling Time Of Population

Why is there great variation among various regions in doubling their population?

What is population doubling time? Explain the characteristics of the growth of population in India in Phase I and II.

The bacterial growth follows the rate law, (dN)/(dt) = KN where 'K' is a constant and 'N' is the number of bacteria cell at any time. If the population of bacteria (no. of cell) is doubled in 5 minutes, find the time by which the population will be eight times of the initial one.

Mika is doing an experiment with bacteria .She finds that , provided there is enough space and food , the population doubles every 2 hours. The population in hour y+10 will be how many times the population in hour y ?

The polulation of a city increases at a rate propotional to the population at that time. If the population of the city is doubled in 60 years, then population will be triplet in (log2=0.6912,log 3=1.0986)

In 1982, population of world was 450 crores. If the rate of increase of population is constant (uniform) and it is doubled in 38 years,then what will be the population of world in 2020AD?

The population of a city ijncreases by 20% at the end of every year. During which of the following years , the population would be doubled ?