depreciation is usually linear, so 100% - 2*20% = 60%
60% of 1,000,000 = 600,000
If you want to use a more complicated exponential model, then
1,000,000 * 0.80^2 = 640,000
the value of s car depreciates by 20% at the beginning of each year. if the car costs 1 million find the value of the car after 2 years.
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