Math Problem Statement

Tamara hat ein neues Auto gekauft. Nach 2 Jahren ist dieses noch 28900€ wert und nach 5 Jahren noch 17748,21€. a) Wie viel hat dieses beim Kauf gekostet? b) Wie viel ist es noch in 10 Jahren wert?

Solution

The question in German is about calculating the original price of a car and its depreciation over time.

Let's break down the question:

  1. Problem: Tamara bought a new car. After 2 years, the car's value is €28,900, and after 5 years, it's worth €17,748.21.
  2. Questions:
    • a) What was the initial purchase price of the car?
    • b) What will its value be in 10 years?

To solve this, we can assume exponential depreciation of the car’s value over time:

Exponential Depreciation Model

The formula for exponential depreciation is: V=PektV = P \cdot e^{-kt} where:

  • VV is the value after tt years,
  • PP is the initial price (which we need to find),
  • kk is the depreciation constant,
  • tt is the time in years.

Step 1: Find kk using given data

We have two values:

  • After 2 years: V=28900V = 28900
  • After 5 years: V=17748.21V = 17748.21

Using these, we can solve for kk and then use it to find PP and answer the other parts of the question. I'll proceed with these calculations.The solution yields three possible values for the initial price PP and the depreciation constant kk. The realistic (real-valued) solution is:

  • Initial Price (P): €40,000 (approximately),
  • Depreciation Constant (k): 0.1625 (approximately).

Interpretation:

  1. **Answer to (

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Math Problem Analysis

Mathematical Concepts

Exponential Depreciation
Algebra
Exponential Functions

Formulas

V = P * e^(-kt)

Theorems

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Suitable Grade Level

Grades 10-12