SOLUTION: Every June 1, an ecologist takes a census of the number of wrens in a state park. She noticed that the number is decreasing by 40% each year. If this trend continues, in what year

Question 262183: Every June 1, an ecologist takes a census of the number of wrens in a state park. She noticed that the number is decreasing by 40% each year. If this trend continues, in what year will the census show that the number of wrens is less than 10% of what is was on June 1, 2005?

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!

2006 .6x=.6x
2007 .6*.6x= .36x
2008 .6*.6*.6=.216
2009 .6*.6*.6*.6=.1296
2010 .6*.6*.6*.6*.6=.077
so five years later June 2010
.6^5x<.1x
RELATED QUESTIONS
A recent census of wild animals in a state park showed that there was a ration of 15:8... (answered by oberobic)

ana noticed that if she takes the opposite of her age and adds 40, she gets the number... (answered by macston)

An employee at a state park has 53 photos of animals found at the park she wants to... (answered by Glaviolette)

An ecologist wishes to find the height of a redwood... (answered by richwmiller)

estimated number of deer in the park.Jared wants to estimate the number of deer in a 600... (answered by checkley77)

The greatest number of tornados in a region occurs in June and the fewest number occurs... (answered by jorel1380)

Based on the Census, state A has 1313 fewer electoral votes for president than (answered by ikleyn)

in a car park, there are 2 white cars for every 3 blue cars and for every 2 blue cars... (answered by josmiceli)

Mr. Hilbert loves word problems and puzzles, so when a U.S census person came to his door (answered by 303795)