SOLUTION: MAT 145: Topics In Contemporary Math 17: Exponential Growth 5) The population of bison was almost hunted to extinction when the United States expanded westward. Th

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Question 1193189: MAT 145: Topics In Contemporary Math

17: Exponential Growth
5) The population of bison was almost hunted to extinction when the United States
expanded westward. The population decreased by 40% per year when the expansion
began in 1803. If the herds of bison originally contained 500,000 bison, how many were
left in 1820
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Expansion westward took from years 1803 to 1820, which was 17 years.
The bison population did not grow; it decayed during those 17 years. If decreased by 40% per year, then the numbers kept 60 % each year.

500000%280.6%29%5E17----------compute in the way you like.