SOLUTION: 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 Sta
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Question 70041: 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 x 2^(y-1990/66)
:
What will the population of the United States be in 2025 if this growth rate continues? Found 2 solutions by stanbon, ankor@dixie-net.com:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 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 x 2^(y-1990/66)
:
What will the population of the United States be in 2025 if this growth rate continues?
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P = 250 x 2^[(2025-1990)/66]
P = 250 x 2^[35/66]
P = 250 x 1.44423...
P = 361.06 million people
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Cheers,
Stan H.
You can put this solution on YOUR website! 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 x 2^(y-1990/66)
:
What will the population of the United States be in 2025 if this growth rate continues?
Replace y with 2025 in the above equation
:
P (in millions) = 250 x 2^(2025-1990/66)
:
P (in millions) = 250 x 2^(35/66)
:
P (in millions) = 250 x 2^.53
:
P (in millions) = 250 x 1.443929
:
P (in millions) = 360.98
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