<PRE><B>Question 315097</B>
In 2008,the world population was 6.7 billion and the exponential growth rate was 1.14% per year. 
A. Find the exponential growth function
A(t) = 6.7 bil (1.14)^t where t is the number of years after 2008.
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B. Predict the world population in 2014
A(6) = 6.7 bil (1.14)^6 = 6.7 bil (2.1950) = 14.71 billion
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C. When will the world population be 8.0 billion
8 bil = 6.7 bil (1.14)^t
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1.194 = 1.14^t
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Take the log:
t*log(1.14) = log(1.194)
t = 1.35 years
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Cheers,
Stan H.
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