
Concept explainers
(a)
To find: The exponential function that is used to model the population.
(a)

Answer to Problem 14PT
The exponential function that is used to model the population is
Explanation of Solution
Given:
The population of a city 10 years ago was 150000.
The current population is 185000
Calculation:
Consider the given condition, the expression is written as,
Here, Y is the current population, a is the population before 20 years, and k is the rate of population.
Thus, the exponential function that is used to model the population is
(b)
To find: The population in 25 years.
(b)

Answer to Problem 14PT
The population in 25 years is 28385550
Explanation of Solution
Given:
The population of a city 10 years ago was 150000.
The current population is 185000
Calculation:
From the part (a), calculate the value of k,
Solve further as,
Calculate the population after 25 years.
Thus, the population in 25 years is 28385550
Chapter 8 Solutions
Algebra 2
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