anonymous
  • anonymous
Suppose the population of trout in a certain stretch of a river is 4000. In about how many years will the population of trout be 700 if the decay rate is 35%? Use the equation 700 = (4000)(0.65)x and round the value of x to the nearest year.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
4 years
anonymous
  • anonymous
how did you get that?
anonymous
  • anonymous
(4000)(0.65)^4

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anonymous
  • anonymous
@arindameducationusc is that right? ^^^
anonymous
  • anonymous
okay @nabiladh thank you!
anonymous
  • anonymous
internets lagging so having a hard time seeing responses
anonymous
  • anonymous
no prob
anonymous
  • anonymous
actually its 1 year 700=4000(0.65)^x 7000/4000=4000/4000(0.65)^x 7/4=(0.65)^x log(7/4)=log(0.65)^x 0.24=xlog(0.65) x=0.24/(0.187) x=1.28 x=1 year
anonymous
  • anonymous
stuck between the 2 idk good luck
arindameducationusc
  • arindameducationusc
@lily1021 i am pretty sure ..thatz not the answer.
anonymous
  • anonymous
hm okay so not 4
anonymous
  • anonymous
@zzr0ck3r can you help with this?
zzr0ck3r
  • zzr0ck3r
\(700 = (4000)(0.65)^x\\\dfrac{700}{4000}=0.65^x\\\ln(\dfrac{700}{4000})=\ln(0.65)^x=x\ln(0.65)\\ x=\dfrac{\ln(\dfrac{700}{4000})}{\ln(0.65)}\approx 4.04605\) or \(700 = (4000)(0.65)^x\\\dfrac{700}{4000}=0.65^x\\\log_{0.65}(\dfrac{700}{4000})=\log_{0.65}(0.65^x)=x\\x\approx 4.04605\)
anonymous
  • anonymous
so it is 4 years then
zzr0ck3r
  • zzr0ck3r
Are you asking me if the closest whole number to \(4.04605\) is \(4\)?
anonymous
  • anonymous
well I'm just confused now because it was 4 then it wasn't then it was 1 then I tried it on my own and got 3 somehow. It really was a rhetorical question.
zzr0ck3r
  • zzr0ck3r
you can check the answer by plugging it in...
zzr0ck3r
  • zzr0ck3r
its always been 4
anonymous
  • anonymous
But that was really unnecessary..
zzr0ck3r
  • zzr0ck3r
lol
anonymous
  • anonymous
It's not that funny. It was rude.
zzr0ck3r
  • zzr0ck3r
they are not mutually exclusive
zzr0ck3r
  • zzr0ck3r
It was meant to be funny. Sorry if you do not like my humor, focus on the math.
anonymous
  • anonymous
Meaning and intent aren't the same thing, so oop @ you. I'm not bothered though.
zzr0ck3r
  • zzr0ck3r
Meaning is actually synonymous to intent?
arindameducationusc
  • arindameducationusc
yes... @zzr0ck3r steps look good yes thats a confirmation @lily1021
zzr0ck3r
  • zzr0ck3r
no need for confirmation. check your answers! If I am right, then \(4000*0.65^{4.04605}=700\) Get your calculators out!!!
arindameducationusc
  • arindameducationusc
LOL
arindameducationusc
  • arindameducationusc
yes, you are right @zzr0ck3r
anonymous
  • anonymous
Not really how something means to me isn't the same as how you meant something to be. English isn't my first language so maybe that's why you didn't understand.
anonymous
  • anonymous
Just leave my question, it's done with.
anonymous
  • anonymous
Please leave my question.
zzr0ck3r
  • zzr0ck3r
I fully understand that you are being a baby. Just say thanks for the help and move on :) It was funny. I know you were not asking me to round it for you, but I wanted to point out that it was a weird question. Also your reply about not being sure because it was 1, then it was 4... did you think I would say, oh actually yeah I am wrong and that other dude is right?
zzr0ck3r
  • zzr0ck3r
jokes again^^^
arindameducationusc
  • arindameducationusc
:D
arindameducationusc
  • arindameducationusc
k, guys i am going.... :)
anonymous
  • anonymous
No you are being rude. So stop. You seem to be the one who can't move on. Like why are you still here? This is my question I politely ask you go away.
zzr0ck3r
  • zzr0ck3r
I can not tell you anymore that I am joking. Also, the question is done. I solved it!!!
anonymous
  • anonymous
And I cannot tell you anymore it wasn't funny. So get off my question if the question is done!!
zzr0ck3r
  • zzr0ck3r
gn sorry :)
zzr0ck3r
  • zzr0ck3r
And I assure you many people would think it was funny.
anonymous
  • anonymous
Maybe pretentious douche bags who look down on people who are bad at math.
anonymous
  • anonymous
Please leave.
zzr0ck3r
  • zzr0ck3r
medal please?
anonymous
  • anonymous
lol
zzr0ck3r
  • zzr0ck3r
there ya go:)

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