A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

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.

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    4 years

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    how did you get that?

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    (4000)(0.65)^4

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @arindameducationusc is that right? ^^^

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay @nabiladh thank you!

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    internets lagging so having a hard time seeing responses

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no prob

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    stuck between the 2 idk good luck

  10. arindameducationusc
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @lily1021 i am pretty sure ..thatz not the answer.

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hm okay so not 4

  12. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @zzr0ck3r can you help with this?

  13. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \(700 = (4000)(0.65)^x\\\dfrac{700}{4000}=0.65^x\\\ln(\dfrac{700}{4000})=\ln(0.65)^x=x\ln(0.65)\\ x=\dfrac{\ln(\dfrac{700}{4000})}{\ln(0.65)}\approx 4.04605\) or \(700 = (4000)(0.65)^x\\\dfrac{700}{4000}=0.65^x\\\log_{0.65}(\dfrac{700}{4000})=\log_{0.65}(0.65^x)=x\\x\approx 4.04605\)

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so it is 4 years then

  15. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Are you asking me if the closest whole number to \(4.04605\) is \(4\)?

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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.

  17. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you can check the answer by plugging it in...

  18. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its always been 4

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    But that was really unnecessary..

  20. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol

  21. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It's not that funny. It was rude.

  22. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    they are not mutually exclusive

  23. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It was meant to be funny. Sorry if you do not like my humor, focus on the math.

  24. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Meaning and intent aren't the same thing, so oop @ you. I'm not bothered though.

  25. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Meaning is actually synonymous to intent?

  26. arindameducationusc
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes... @zzr0ck3r steps look good yes thats a confirmation @lily1021

  27. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no need for confirmation. check your answers! If I am right, then \(4000*0.65^{4.04605}=700\) Get your calculators out!!!

  28. arindameducationusc
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    LOL

  29. arindameducationusc
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, you are right @zzr0ck3r

  30. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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.

  31. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Just leave my question, it's done with.

  32. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Please leave my question.

  33. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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?

  34. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    jokes again^^^

  35. arindameducationusc
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    :D

  36. arindameducationusc
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    k, guys i am going.... :)

  37. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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.

  38. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I can not tell you anymore that I am joking. Also, the question is done. I solved it!!!

  39. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And I cannot tell you anymore it wasn't funny. So get off my question if the question is done!!

  40. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    gn sorry :)

  41. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And I assure you many people would think it was funny.

  42. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Maybe pretentious douche bags who look down on people who are bad at math.

  43. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Please leave.

  44. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    medal please?

  45. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lol

  46. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    there ya go:)

  47. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.