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Bas_tet [7]
3 years ago
11

In 2010, a city population was 55,210 and it was declining at a rate of 1.09 each year. What is the best prediction for when the

city population will first be below 48,000?
2019
2022
2025
2028
Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
5 0
48000=55210(1-0.0109)^t
Solve for t
t=12.77 =13 years
2010+13=2023

So the answer is c
Volgvan3 years ago
5 0

Answer:

The city population will first be below 48,000 in the year:

2022

Step-by-step explanation:

It is given that:

In 2010, a city  population was 55,210

in 2011 the city population will be

(100-1.09)×55210/100=98.91×55210/100

                                  = 0.9891×55210

in 2012 the city population will be

0.9891×0.9891×55210

we have to find number of years t such that

(0.9891)^{t}55210

i.e. the thirteen years from 2010 we will have city population less than 48000

i.e. in the year 2022

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