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The population of a country has increased at a rate of 2.7% every year for 5 years. If...
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The present population of the country is 15.2 million = 15.2*10^6. The population has grown at 2.7% per year for 5 years.
Let the population five years ago be P.
P*(1.027)^5 = 15.2*10^6
=> P = 15.2*10^6/(1.027)^5
=> P = 13.3*10^6
The population 5 years ago was 13.3 million
Posted by justaguide on October 10, 2011 at 2:53 AM (Answer #1)
@justaguide thanks but I'm supposed to be using series and sequences notation, like U1, U5.. And I'm supposed to be solving with the geometric sequence formulas such as Un = U1 * r^n
r is the ratio by which you multiply a term to get the one after it in a geometric sequence
Posted by sophiaba on October 10, 2011 at 3:29 AM (Answer #2)
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