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364500=500000(1−10/100)n

364500=500000(9/10)n

500000(9/10)n = 364500

=

(9/10)n=729/1000

(9/10)n=729/1000

log((9/10)n)=log(729/1000)(Take log of both sides)

n*(log(9/10))=log(729/1000)

n=log(729/1000)log(9/10)

n=3

n=3