Question

the population of a city is 45,000 and decreases 2% each year. if the trend continues, what will the population be after 15 yrs? a) about 14,746 b) about 33,236 c) about 41,000 d) about 47,504

Answer 1

In order to get the answer, let's make the solution first:
Given: 45,000 = current population
           2% / year = decrease
            ? = population after 15 years
First, we get 2% of 45, 000 and the result is 900.
# of years
1   :   44, 100
2.   :  43, 218
3   : 42, 353.64
4  :   41, 506.57
5  : 40, 676.44
6   : 39, 862.91
7 : 39,065.65
8  : 38,284.34
9   : 37, 518.65
10  : 36,768.28
11    : 36, 032.91
12  : 35, 312.25
13  : 34, 606.01
14  : 33, 913.89
15:  33, 235.61
So the answer would be option B. 33, 236. 
Hope this is the answer that you are looking for.