Answer to Question #277234 in Algebra for abcde

Question #277234

Using the world population formula P = 6.9(1.011)t, where t is the number of



years after 2010 and P is the world population in billions of people, estimate:



a) the population in the year 2030 to the nearest hundred million, and



b) by what year will the population be double from 2010?


1
Expert's answer
2021-12-09T03:23:43-0500
P=6.9(1.011)tP = 6.9(1.011)^t

a)


t=20302010=20(years)t=2030-2010=20(years)

P=6.9(1.011)20=8.6P = 6.9(1.011)^{20}=8.6

The world population will be 8.6 billions of people in 2030.


b)


P(t1)=6.9(1.011)t1=2(6.9)P(t_1) = 6.9(1.011)^{t_1}=2(6.9)

(1.011)t1=2(1.011)^{t_1}=2

t1=ln2ln1.011t_1=\dfrac{\ln2}{\ln1.011}

t1=63.36 yearst_1=63.36\ years

2010+64=20742010+64=2074

The population will be double by 2074.



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