Question 77411
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?
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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.