SOLUTION: Please help, I do not know what to do? The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 yea

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Question 77411: Please help, I do not know what to do? The U.S. population in 1990 was approximately 250 million, and the average growth rate for the past 30 years gives a doubling time of 66 years. The above formula for the United States then becomes P(in millions) = 250 * 2^(y-1990)/66 Social science. What will the population of the United States be in 2025 if this growth rate continues?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The above formula for the United States then becomes
P(year) = 250 * 2^(y-1990)/66
What will the population of the United States be in 2025
if this growth rate continues?
------------
P(2025) = 250*2^(2025-1990)/66
P(2025) = 250*2^(35/66)
P(2025) = 250*2^(0.53)
P(2025) = 250*1.444229..
P(2025) = 361.0573708 million
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Cheers,
Stan H.