The population of a city increases each year by 4% of what it had been at the beginning of each year. If its present population is 6760000 ,find: (1) its population 2 years hence (2)its population 2 years ago.

Dear student, 

Population increase=4%
present population= 6760000 
1)  
4%of 6760000
=4/100*6760000
=27040

Population after 1 yr
=6760000+27040
=6787040

Population after 2 yr
=6787040+(4/100*6787040)
=7058522(approx)

Again,
 
present population= 6760000
4% of 6760000=27040

Population 1yr ago
=6760000-27040
= 6732960

Now
4% of 6732960
=269318.4

Population 2yr ago
=6732960-269318.4
=6463642(approx)

Regards 

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