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me123456789
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the beginning of 1975 the population of a country was 40 million and growing at a rate of 3% per year. Assume that the growth is exponential. Estimate the population of the country at the beginning of the year 2010
 2 years ago
 2 years ago
me123456789 Group Title
the beginning of 1975 the population of a country was 40 million and growing at a rate of 3% per year. Assume that the growth is exponential. Estimate the population of the country at the beginning of the year 2010
 2 years ago
 2 years ago

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Rohangrr Group TitleBest ResponseYou've already chosen the best response.0
of course 80 million
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
im sorry and how did you get this?
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
plz help
 2 years ago

mubzz Group TitleBest ResponseYou've already chosen the best response.0
This can be taken as a geometric progression where the population at any given year is given by \[ar ^{n1}\] where a is starting population and 'r' in this case is 1.03 as the population is increasing. Now count the years, from 1975 to 2010, 35 years. So you use formula population = \[40000000\times1.03^{35}\] population approx 112 million
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
i got 83751117 how did you get 112 mil?
 2 years ago

mubzz Group TitleBest ResponseYou've already chosen the best response.0
how did you get that? Because I've used exponential population growth method and geometric progression and got the same answer
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
ok i rechecked it ant got 1.05 and the answer was 135mil
 2 years ago

mubzz Group TitleBest ResponseYou've already chosen the best response.0
ok let me g through it again. two mins :)
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
40000000*1.05^24 was 129003997.7
 2 years ago

mubzz Group TitleBest ResponseYou've already chosen the best response.0
it can't be 1.05 as you gave the growth rate to be 3% If it is 5%, then you get 40(1.05)^35 = 220 million Check your question again. You get 135 million if the growth rate is 5% and the time period is 1975 to 2000
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
yeah the years are 1975 to 2010
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
can you help me with this one?
 2 years ago

me123456789 Group TitleBest ResponseYou've already chosen the best response.0
If the population of bacteria doubles in 4 hours how long will it take for it to triple its original size
 2 years ago
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