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mellonballs2487
02.12.2019 •
Mathematics
Two different cars each depreciate to 60% of their respective original values. the first car depreciates at an annual rate of 10%. the second car depreciates at an annual rate of 15%. what is the approximate difference in the ages of the two cars?
1.7 years
2.0 years
3.1 years
5.0 years
Solved
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Ответ:
1
Step-by-step explanation:
Let the original price of first car = x dollars,
If after t years the price of car by decreasing 10% per year = 60 % of the original price = 60 % of x = 0.6 x
Hence, For first car,
By taking log on both sides,
Now,
Let the original price of second car = y dollars,
If after t years the price of car by decreasing 15% per year = 60 % of the original price = 60 % of y = 0.6 y
Hence, For second car,
By taking log on both sides,
Hence, the difference in the ages of the two cars = 4.85 - 3.14=1.71 years.
Thus, the difference in the ages of the two cars is approximately 1 years.
Ответ: