A population is

The rapid increase in human population is called population crash.

The rate of growth of a population is proportional to the number present if the population of a city doubled in the past 25 years,and the present population is 100000, when will the city have a population of 500000?

If the rate of increase in population is r% per year, the population after n years is p, find the population that was n years before.

If the rate of increase in population of is r% per year, the population after t years is p, Find the population that was t years before.

Rapid increases in human population is called population explosion. Write two methods to control over population.

The population P in any year t is such that the rate of increase in the population is proportional to the population. Then

In a population the proportion of pre-reproductive individuals is high. The population is