The population of a town grows by 20 % every year .If its present population is 432000 find its population 2 years ago
Answers
Answer:
Step-by-step explanation:
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Answer:
The exponential increasing function is given by
Where a is the initial value , r is the rate of interest in the decimal form and t is the time in years .
As given
The population of a town increases by 20 % every year.
if its present population is 432000 .
a = 432000
20% is written in the decimal from .
= 0.20
r = 0.20
t = 2 years
Putting all the values in the exponential function .
y = 432000 × 1.44
y = 622080
Answer:
432000-43200×20/100×2
Step-by-step explanation:
Population of the town =432000
Population growth per year =20%
Population growth in one year =432000×20/100
=86400
Population growth in two years =86400×2
=172800
therefore population growth 2years ago=432000-172800
=259200