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A car's value depreciates at a rate of [tex]3.4\%[/tex] per year. The car was worth [tex]\$30,000[/tex] when it was new.

Which equation could be used to determine when the car will be worth [tex]\$18,500[/tex], where [tex]x[/tex] is time in years?

A. [tex]18500 = 30000(0.034)^x[/tex]

B. [tex]18500 = 30000(0.966)^x[/tex]

C. [tex]30000 = 18500(0.034)^x[/tex]

D. [tex]30000 = 18500(0.966)^x[/tex]

Answer :

To determine which equation can be used to find when the car will be worth [tex]$18,500, we need to understand how depreciation works.

1. Understand Depreciation:
- The car depreciates at a rate of 3.4% per year.
- This means each year, the car retains 100% - 3.4% = 96.6% of its value from the previous year.

2. Depreciation Factor:
- Each year, the value of the car is multiplied by 96.6%, or 0.966.

3. Value After x Years:
- If the car's initial value is $[/tex]30,000, after x years, its value will be:
[tex]\[
\text{Value after } x \text{ years} = 30,000 \times (0.966)^x
\][/tex]

4. Set Up the Equation:
- We need to find when the car's value equals [tex]$18,500, so we set up the equation:
\[
18,500 = 30,000 \times (0.966)^x
\]

5. Select the Correct Equation:
- This setup matches option B from the given choices:
- B. \(18500 = 30000 \times (0.966)^x\)

Therefore, option B is the correct equation to determine when the car will be worth $[/tex]18,500.

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