SOLUTION: In 1975 the popultation of the earth was approximately 4 billion and dobuling every 35 years. The formula for the population P in Year Y for this doubling rate is P(in billions) =

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: In 1975 the popultation of the earth was approximately 4 billion and dobuling every 35 years. The formula for the population P in Year Y for this doubling rate is P(in billions) =      Log On


   



Question 96762: In 1975 the popultation of the earth was approximately 4 billion and dobuling every 35 years. The formula for the population P in Year Y for this doubling rate is P(in billions) = 4x 2(y-1975)/35. What will the population be in 2025 if tis growth rate continues?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
P(year) = 4x 2^[(y-1975)/35]: P in billions.
What will the population be in 2025 if tis growth rate continues?
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P(2025)= 4*2^[(2025-1975)/35]
= 4^2^(50/35)
= 4*2^(10/7)
= 4*2^(1.42857...)
=4*2.6918...
=10.7672... billion
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Cheers,
Stan H.