hematics - Algebra 1 > Exponential growth: word problems V84
A city's population is currently 538,000. If the population doubles every 6 years, what will the
population be 12 years from now?
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people



Answer :

To find the population of the city 12 years from now, we need to understand the concept of exponential growth, specifically how populations double over a given period.

### Step-by-Step Solution:

1. Understand the Problem:
- Current population: 538,000 people
- Doubling time: 6 years
- Time period of interest: 12 years

2. Determine How Many Doublings Occur:
- Since the population doubles every 6 years, we need to find out how many 6-year periods fit into 12 years:
[tex]\[ \text{Number of doublings} = \frac{\text{Time period of interest}}{\text{Doubling time}} = \frac{12 \text{ years}}{6 \text{ years}} = 2 \text{ doublings} \][/tex]

3. Calculate the Population After Each Doubling:
- The population doubles twice over 12 years.
- Initial population: 538,000

- After the first doubling (6 years):
[tex]\[ \text{Population} = 538,000 \times 2 = 1,076,000 \][/tex]

- After the second doubling (another 6 years, total 12 years):
[tex]\[ \text{Population} = 1,076,000 \times 2 = 2,152,000 \][/tex]

4. Conclusion:
- The population 12 years from now will be 2,152,000 people.

### Final Answer:
[tex]\[ \boxed{2,152,000 \text{ people}} \][/tex]