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Crazy boy [7]
3 years ago
15

The population of a city in 2005 was 18,000. By 2010, the city’s population had grown to 45,000. If the population growth follow

s a exponetial model, what is the projected population for 2015?
Mathematics
1 answer:
olga_2 [115]3 years ago
5 0
First find the rate of growth
45000=18000(1+r)^(2010-2005)
Solve for r
r=((45,000÷18,000)^(1÷5)−1)×100
R=20%
Use it to find the population in 2015
P=45000(1+0.20)^(2015-2010)
P==111,974.4
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3 years ago
4/5 of a number is more than 3/4 of the number by 5.find the numbers
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What should the next number be? 100 96 104 88 120 56
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96 ---> 104 is +8

104 ---> 88 is -16

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120 ---> 56 is -64  

So first we go down by 4, then up by 8, then down 16, then up 32, then finally down 64.  

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Notice it's the powers of 2:  

2^2 = 4

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The last difference is -64, which doubles to -128. Change the sign to positive to get +128  

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8 0
3 years ago
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