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Algebra II

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I first want to make it clear that I have only taken Geometry, Algebra I, and pre-Algebra. That seemed to clear things up last time.

Question:
Matt bought a car at the cost of 25,000 dollars. This car's value goes down 15% every year.
1. What is the decay factor?
2. Write the equation to model the decay factor.
3. What will the car be worth in 5 years?

  • Algebra II - ,

    If something decreases by 15%, then 85% would be left over.
    equation:
    value = 25000(.85)^t , where t is the number of years

    so in 5 years, t - 5
    value = 25000(.85)^5 = ......

  • Algebra II - ,

    Thank you c:

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