Question

The present population is 250000.
Annual birth rate is 10.5%
Annual death rate is 7.5%
Find the population after 3 years

Answer 1

( * )[stands for multiply] ( -: ) stands for fraction (upon)
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present population = 250000
annual birth rate = 10.5%
annual death rate = 7.5%
TO FIND => POPULATION AFTER 3 YEARS
net growth rate = birth rate - (death rate)%
= 10.7 %-7.5 %
= 3.2 %
(now) = 250000*(1+3.2-:100)^3
= 250000*(10032-:100)^3
= 250000*(5016 upon 50)^3
= 250000*5016 upon 50*5016 upon 50*5016 upon 50