Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

JamenS Group Title

A motor scooter purchased for $1,000 depreciates at an annual rate of 15%. Write an exponential function, and graph the function. Use the graph to predict when the value will fall below $100.

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. Traxter Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    You must be able to start this one off for yourself. Can you show us what you have so far?

    • 2 years ago
  2. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    1000(1.15)=100?

    • 2 years ago
  3. hal_stirrup Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    hi

    • 2 years ago
  4. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    hi

    • 2 years ago
  5. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    can u help me :)

    • 2 years ago
  6. hal_stirrup Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok ask you self . what is the value of motor scooter after 1 year?

    • 2 years ago
  7. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    150$....

    • 2 years ago
  8. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ?

    • 2 years ago
  9. hal_stirrup Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    no

    • 2 years ago
  10. hal_stirrup Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so what the question is really saying is , the value of motor scooter goes down by 15%.

    • 2 years ago
  11. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    100 = 1000e^(-0.15t)

    • 2 years ago
  12. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    850$

    • 2 years ago
  13. hal_stirrup Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @SNSDYoona we dont give answers out like that.

    • 2 years ago
  14. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    1000 = the starting money that u purchased it the basic formula for this exponential decay and growth functions is A= Ye^(kt)

    • 2 years ago
  15. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thts why i give him the answer first to see if he does any calculation wrong then explain to him if he doesnt get it

    • 2 years ago
  16. hal_stirrup Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thats why we don't give answers out. you need to explain the exponential formula. Not just stated it!!!

    • 2 years ago
  17. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    A = the amount u left after a certain period of time Y = initial amount started with k = ur rate of decay/growth t= the time

    • 2 years ago
  18. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    0.1=(-0.15t)

    • 2 years ago
  19. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ?

    • 2 years ago
  20. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    have u learn natural logs?

    • 2 years ago
  21. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    from 100 = 1000e^(-0.15t) u simplify it then u get down to 0.1= e^(-0.15t) then u take the natural logs off both side u get ln(0.1) = -0.15t then u solve for t ln(0.1)/0.15 = t

    • 2 years ago
  22. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i got 0.666

    • 2 years ago
  23. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    u shud get 15.35

    • 2 years ago
  24. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    use ur calculator.. did u type in correctly?

    • 2 years ago
  25. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i divide .1 by .15?

    • 2 years ago
  26. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    nonono u use ln << ln = natural log

    • 2 years ago
  27. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    look at ur calculator and search for ln

    • 2 years ago
  28. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    press ln and then (0.1)

    • 2 years ago
  29. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    then divide by (-0.15)

    • 2 years ago
  30. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    im using google calculator i dont have 1

    • 2 years ago
  31. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    15.3?

    • 2 years ago
  32. SNSDYoona Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeap

    • 2 years ago
  33. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    v(t) = 0.85(1000)t; the value will fall below $100 in about 18 yr. v(t) = 1000(0.85)t; the value will fall below $100 in about 18 yr. v(t) = 0.85(1000)t; the value will fall below $100 in about 14.2 yr. v(t) = 1000(0.85)t; the value will fall below $100 in about 14.2 yr.

    • 2 years ago
  34. JamenS Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    u still there

    • 2 years ago
  35. cnn1999 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    hi

    • 3 months ago
    • Attachments:

See more questions >>>

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.