In 2005, for each of the 14 million people present in a country, 0.028 were born and 0.008 died during the year. Using exponential equation, the number of people present in 2015 is predicted as
1. 25 millions
2. 17 millions
3. 20 millions
4. 18 millions
(b) Exponential equation
dN /dt = (b - d) x N
dN/10 = (0.028-0.008) x 14 (0.020) x 14
dN/10 = 28
dN = 28x 10
dN = 2.8
= 14 million +2.8 million
= 168 million =17 million
So, the number of people present in 2015 is predicted as 17 millions.
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