The world's population is 1970 was about 3.6 billion. If the population has increased at 2% each year since then, what will the world's population be in 2010?

Answer 1

To calculate the population in 2010, we use the formula for exponential growth:

Final Population = Initial Population * (1 + growth rate) ^ number of years

In this case, the Initial Population is 3.6 billion, the growth rate is 2% (0.02), and the number of years is 2010 - 1970 = 40 years.

Final Population = 3.6 billion * (1 + 0.02)^40
Final Population = 3.6 billion * (1.02)^40
Final Population = 3.6 billion * 2.208039
Final Population ≈ 7.94894 billion

So, the world's population in 2010 will be approximately 7.95 billion.