SOLUTION: A certain substance decomposes and loses 20% of its weight each hour.If there is originally 4,000 grams of this substance, how much remains After 5 hours?

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Question 363534: A certain substance decomposes and loses 20% of its weight each hour.If there is originally 4,000 grams of this substance, how much remains After 5 hours?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
4,000(1-.20)^5
4,000(.80)^5
4,000*.328=1,310.72 GRAMS ANS.