A population grows at the rate of 2.5% per annum. How long does it take for the population to double?

How is population growth rate measured?

The population of a place increased to 54,000 in 2003 at a rate of 5% per annum : find the population in 2001.

A country has a food deficit of 10%. Its population grows continuously at the rate of 3% per year. Its annual food production every year is 4% more than that of the last year Assuming that the average food requirement per person remains constant, prove that the country will become self-sufficient in food after n years, where n is the smallest integer bigger than or equal to (log_e 10-log_e 9)/((log_e 1.04)-0.03)

The population of a place increased to 54,000 in 2003 at a rate of 5% per annum : what would be its population in 2005?

What is dispersal? How does it effect the population size and population density