Question

In 2005, for each of the 14 million people present in a country, 0.028 were born and 0.008 died during year. Using exponential equation, the number of people present in 2015 is predicted as:
Using exponential equation, the number of people present in 2015 is predicted as:

• A. 25 millions
• B. 17 millions
• C. 20 millions
• D. 18 millions

Answer 1

The correct option is B 17 millions

• The exponential equation for population growth is given by :

N_t =N₀ e^rt

• Here, Nt = Population after time t

No = Initial population.

r = growth rate = b-d = 0.028-0.008 = 0.02

t = time difference = 10 years.

• Applying it to the given equation,

Nt = 14 × e^ 0.02*10

Nt = 14 × 1.22 = 17 millions.

So, the correct option is '17 millions'.