Asked by kate
A laptop computer is purchased for
$5000
. Each year, its value is
70%
of its value the year before. After how many years will the laptop computer be worth
$300
or less
$5000
. Each year, its value is
70%
of its value the year before. After how many years will the laptop computer be worth
$300
or less
Answers
Answered by
Damon
300 = 5000 (.7)^n
.06 = .7^n
log .06 = n log .7
so
n = log.06/log.7 = 7.89 years
.06 = .7^n
log .06 = n log .7
so
n = log.06/log.7 = 7.89 years
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