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The value of a textbook is $120 and decreases at a rate of 12% per year. Write a function to model the situation and then find the value of the textbook after 9 years.
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The value of a textbook is $120 and decreases at a rate of 12% per year. Write a function to model the situation and then find the value of the textbook after 9 years.

User Oussaki
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120(0.12) = $14.40

After the first deduction, the book now costs $105.60.

It decreases $14.40 per year.

Do this for 8 more years.

This should give you what you need to form the needed function modeling the situation.

User Wuputah
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