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 2 years ago
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
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

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

mubzz
 2 years ago
Best ResponseYou've already chosen the best response.0This 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

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

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

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

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

me123456789
 2 years ago
Best ResponseYou've already chosen the best response.040000000*1.05^24 was 129003997.7

mubzz
 2 years ago
Best ResponseYou've already chosen the best response.0it 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

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

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

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