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Post Reply Trees in da Forest
Posted 9/12/08 , edited 10/11/08
Hey buddies i wanted to post a question too^^
I hope its not too easy/difficult :)
Have fun solving it

The number of trees in a forest developes equivalent to a growth function that accounts for the birth rate g as well as for the dying rate s. The dying rate grows propotionally to the time e.g. due to the changing climate. This so called venomed growth is described through the function

B(t)=C*e^(gt-0.5st²)

In the discribed forest with an initial population of C=50 trees in the year 2000, you assume a birth rate g=0.1 and a dying rate of s=0.01 for the next 50 years.

In which year is the highest number of trees in the forest? How many are they?
At what point in time is the highest rate of growth?
After how many years is only one tree remaining?

If you have any problems understanding the question, just ask me^^
Im sorry for my bad english...
Posted 9/12/08
i have a Q dude , is there any option buddy?
Posted 9/12/08

itsumiriku wrote:

i have a Q dude , is there any option buddy?


of course there is dude xD
it requires some knowledge tho^^
Posted 9/12/08
i cant think right now dude but it is a difficult one
Posted 9/12/08
ok giv me hints ^^
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Posted 9/12/08
i like this one seems fun ill get it in a bit maybe
Posted 9/12/08

dreems-girl wrote:

ok giv me hints ^^


okay i give you one^^

hint1: find out B'(t)
Posted 9/12/08 , edited 9/12/08
well i have 1

Do you want to take an intelligence test?

What is the colour of the sky?
What number follows 6?
Which animal goes moo?
What is your favourite day?
What is your favourite colour?

What was the first question you were asked??


its sooo easy iam sure u will solv it ^^
Posted 9/12/08
Do you want to take an intelligence test? Yes
What is the colour of the sky?: Blue
What number follows 6?: 7
Which animal goes moo?: Cow
What is your favourite day?: Friday
What is your favourite colour?: Blue

What was the first question you were asked?: Do you want to take an intelligence test?

did i pass?^^
Posted 9/12/08

Renfiel wrote:

Do you want to take an intelligence test? Yes
What is the colour of the sky?: Blue
What number follows 6?: 7
Which animal goes moo?: Cow
What is your favourite day?: Friday
What is your favourite colour?: Blue

What was the first question you were asked?: Do you want to take an intelligence test?

did i pass?^^


yap c this is the great & fun Q hahahhahahha
Posted 9/12/08

dreems-girl wrote:


Renfiel wrote:

Do you want to take an intelligence test? Yes
What is the colour of the sky?: Blue
What number follows 6?: 7
Which animal goes moo?: Cow
What is your favourite day?: Friday
What is your favourite colour?: Blue

What was the first question you were asked?: Do you want to take an intelligence test?

did i pass?^^


yap c this is the great & fun Q hahahhahahha


yep hehe^^

what about mine? xD
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Posted 9/12/08

Renfiel wrote:


dreems-girl wrote:

ok giv me hints ^^


okay i give you one^^

hint1: find out B'(t)


what is e then i might be able to get a answer
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Posted 9/12/08
ok i got 500 but its proble not right it was more of a guess sence i dont know what e is or what t or b is
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Posted 9/12/08
o and what the hell is the power
Posted 9/12/08

JESTDIE wrote:

ok i got 500 but its proble not right it was more of a guess sence i dont know what e is or what t or b is


nahh dude 500 is not right for any of the questions
and:

B(t) is the function

t is the variable for time (in years)

e = 2,718281828459... (see http://en.wikipedia.org/wiki/E_(mathematical_constant) for more info)
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