Exponential and Logarithmic Functions - Applications of Exponential and Logarithmic Functions

Exponential and Logarithmic Functions - Applications of Exponential and Logarithmic Functions

TGM Original Questions

The value, \(V\) dollars, of a second-hand vehicle depreciates over time. Given that \(V=153000{{\mathrm e}^{dt}}\), where \(t\) is the time in years since it was bought and \(d\) is the constant of depreciation. Calculate

  1. the initial value of the vehicle,
  2. the value of \(d\), if after 3 years, the value of the vehicle dropped by one-third of its initial value.
  3. the value of \(t\) when the value of the vehicle is one-sixth its original value.

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Answer:(a) \(V = \$153,000\) (b) \(d = \frac{1}{3}\ln\left(\frac{2}{3}\right)\) or \(-0.135\) (3 s.f.) (c) \(t = 13.3\) years (3 s.f.)

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