SOLUTION: The population of the world in 1995 was 5.7 billion people. The observed population growth rate was 2% per year. -Assuming the growth rate doesn't change, what will the populat

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Question 1010080: The population of the world in 1995 was 5.7 billion people. The observed population growth rate was 2% per year.
-Assuming the growth rate doesn't change, what will the population be in the year 2046?
-In what year will the worlds population have tripled?
-The predicted sustainable population of the earth is 20.1 billion people. When will Earth have too many people?
I got 15.6 billion for part a and I need help on parts b and c. Thank you!!
Answer by stanbon(75887) About Me  (Show Source):
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The population of the world in 1995 was 5.7 billion people. The observed population growth rate was 2% per year.
-Assuming the growth rate doesn't change, what will the population be in the year 2046?
1995 to 2046 is 51 years
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A(51) = 5.7*1.02^51 = 15.65 billion
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-In what year will the worlds population have tripled?
Ans:: When 1.02^x = 3
x = log(3)/log(1.02) = 55.48 years or the year 1995 + 55.48 = 2050
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-The predicted sustainable population of the earth is 20.1 billion people. When will Earth have too many people?
Solve:: 20.1 = 5.7(1.02)^x
3.52 = 1.02^x
x = log(3.52)/log(1.02) = 63.55 or the year 2058
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Cheers,
Stan H.
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I got 15.6 billion for part a and I need help on parts b and c. Thank you!!