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

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

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

i.e. in the year 2022

1/8 is left? add a bit more info plz