lesly2020Mcruzmarie lesly2020Mcruzmarie
  • 24-02-2021
  • Mathematics
contestada

The population of a town is 15,000. It decreases at a rate of 8% per year. In about how many years
will the population be fewer than 10,000?

Respuesta :

madethisfortwitch1
madethisfortwitch1 madethisfortwitch1
  • 24-02-2021

Answer:

5

Step-by-step explanation:

If a population is decreasing by 8% we can multiply the population by 92% (1-.08)

which means we have the following equation

population=15000(.92)ⁿ

where n is the number of years

we want to know when the population will be 10,000 so we write

10,000=15,000(.92)ⁿ

.66667=.92ⁿ

a rule we have is

[tex]n=y^x\\log_yn=x[/tex]

which means that

[tex].66667=.92^n\\=log_{.92}.66667[/tex]

compute this and get

4.867

round this up to 5

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