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Concept explainers
a
To tell whether the model represent exponential growth or exponential decay.
a
![Check Mark](/static/check-mark.png)
Answer to Problem 21E
The model representexponential decay
Explanation of Solution
Given information :
The value of mountain bike
the base 0.75 is greater than 0 and less than 1,so the model represents exponential decay.
Hence,model represent exponential decay.
b
To identify the annual percent increase or decrease in the value of the bike .
b
![Check Mark](/static/check-mark.png)
Answer to Problem 21E
The annual decrease in the value of bike is 25%
Explanation of Solution
Given information :
The value of mountain bike
Because
Hence, the annual decrease in the value of bike is 25%
c
To estimate the time when the value of the bike will be $50.
c
![Check Mark](/static/check-mark.png)
Answer to Problem 21E
The time when the value of the bike will be $50 in 4.82 years
Explanation of Solution
Given information :
The value of mountain bike
Use the trace feature of a graphing calculator to determine that
Hence, the time when the value of the bike will be $50 in 4.82 years.
Chapter 6 Solutions
Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015
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