A countrys population in 1992 was 72 million in 1998 it was 76 million estimate the population in 2012 using the exponential growth formula?

Hi there

First find the rate of growth between

1992 and 1998

The formula is

P=Ae^rt

P the population in 1998. (76 million)

A the population in 1992 (72 million)

E constant

R rate of growth?

T time 1,998-1,992=6 years

We need to solve for r

R=[log (p/A) : log (e) ]:t

R = (log (76:72) : log (e)) : 6

R=0.009

Now find the population in 2012

P=Ae^rt

P?

A 72 million

R 0.009

T 2,012-1,992=20 years

So

P=72*e^ (0.009*20)

P=86.2 round your answer to get

P=86 million

Good luck!