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jalst6084
12.11.2019 •
Mathematics
Alaptop computer is purchased for $4500. each year, its value is 80% of its value the year before. after how many years will the laptop computer be worth $1000 or less?
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Ответ:
So after 7 year price of the laptop will be less than $1000
Step-by-step explanation:
We have given price of the laptop is $4500
Its price is 80% of if its value in every next year
So depreciation rate = 100 - 80 =20%
For depreciation we know that
Here V is final value and P is present value
So![1000=4500(1-0.2)^n](/tpl/images/0371/0838/87247.png)
Taking log both side
n = 6.74
So after 6.74 year the price of the laptop will be less than $1000
Ответ:
The fourth one
Step-by-step explanation:
y=x/2