Question
Suppose a city with population 100,000 has been growing at a rate of \( 6 \% \) per year. If this rate continues, find the population of this city in 25 years. The population in 25 years will be approximately \( \square \). (Round to the nearest whole number as needed.) \( 26=11: 59 \mathrm{pm} \) Thes
Ask by Johnston Rose. in the United States
Jan 24,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
The population of the city in 25 years will be approximately 429,187.
Solution
Given:
- Initial population of the city = 100,000
- Annual growth rate = 6%
We need to find the population of the city in 25 years.
To find the population in 25 years, we can use the formula for compound interest:
\[ A = P(1 + r)^n \]
where:
- \( A \) is the final amount (population in 25 years)
- \( P \) is the initial amount (initial population of 100,000)
- \( r \) is the annual growth rate (6% or 0.06)
- \( n \) is the number of years (25)
Substitute the given values into the formula:
\[ A = 100,000(1 + 0.06)^{25} \]
Now, we can calculate the population in 25 years.
Calculate the value by following steps:
- step0: Calculate:
\(100000\left(1+0.06\right)^{25}\)
- step1: Add the numbers:
\(100000\times 1.06^{25}\)
- step2: Convert the expressions:
\(100000\left(\frac{53}{50}\right)^{25}\)
- step3: Simplify:
\(100000\times \frac{53^{25}}{50^{25}}\)
- step4: Rewrite the expression:
\(2500\times 40\times \frac{53^{25}}{50^{25}}\)
- step5: Rewrite the expression:
\(50^{2}\times 40\times \frac{53^{25}}{50^{25}}\)
- step6: Reduce the numbers:
\(40\times \frac{53^{25}}{50^{23}}\)
- step7: Rewrite the expression:
\(10\times 4\times \frac{53^{25}}{50^{23}}\)
- step8: Rewrite the expression:
\(10\times 4\times \frac{53^{25}}{10^{23}\times 5^{23}}\)
- step9: Reduce the numbers:
\(4\times \frac{53^{25}}{10^{22}\times 5^{23}}\)
- step10: Rewrite the expression:
\(4\times \frac{53^{25}}{2^{22}\times 5^{22}\times 5^{23}}\)
- step11: Rewrite the expression:
\(2^{2}\times \frac{53^{25}}{2^{22}\times 5^{22}\times 5^{23}}\)
- step12: Reduce the numbers:
\(1\times \frac{53^{25}}{2^{20}\times 5^{22}\times 5^{23}}\)
- step13: Multiply the fractions:
\(\frac{53^{25}}{2^{20}\times 5^{45}}\)
The population of the city in 25 years will be approximately 429,187.
Reviewed and approved by the UpStudy tutoring team
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The Deep Dive
To find the population of the city after 25 years, we can use the formula for exponential growth: \[ P = P_0 (1 + r)^t \] Where: - \( P_0 \) is the initial population (100,000), - \( r \) is the growth rate (6% or 0.06), - \( t \) is the time in years (25). Plugging in the values: \[ P = 100,000 (1 + 0.06)^{25} \] \[ P = 100,000 (1.06)^{25} \] Calculating \( (1.06)^{25} \) gives approximately 4.29187. Therefore: \[ P \approx 100,000 \times 4.29187 \] \[ P \approx 429,187 \] So, the population in 25 years will be approximately \( 429,187 \).