Ethiopia has a population of around 80 million ppl and it estimate that the population grows every year at average growth rate of 2.3% if the population growth continues at the same rate
what will be the population after
10 & 20 years

Question

Ethiopia has a population of around 80 million ppl and it estimate that the population grows every year at average growth rate of 2.3%  if the population growth continues at the same rate 
what will be the population after
10 & 20 years

anonymous · Answer

$$S_n=S\left(1-\frac{p}{100}\right)^n$$

anonymous · Answer

100.43 million, after 10 years

anonymous · Answer

126.067 million after 20 years

anonymous · Answer

@ Tomas, i guess, that will be a + sign.. otherwise, all are correct

anonymous · Answer

ah sorry i meant $\pm$ and in this case it would be +