A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

emogirl100

  • one year ago

A store had 235 MP3 players in the month of January. Every month, 30% of the MP3 players were sold and 50 new MP3 players were stocked in the store. Which recursive function best represents the number of MP3 players in the store f(n) after n months? f(n) = 0.7 × f(n − 1) + 50, f(0) = 235, n > 0 f(n) = 237 − 0.7 × f(n − 1) + 50, f(0) = 235, n > 0 f(n) = 0.3 × f(n − 1) + 50, f(0) = 235, n > 0 f(n) = 237 + 0.7 × f(n − 1) + 50, f(0) = 235, n > 0

  • This Question is Closed
  1. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @imqwerty @

  2. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @xapproachesinfinity

  3. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    look for the pattern

  4. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

  5. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    month of February we have 253 lets call that first month okay

  6. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  7. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so month 1 we have 253 month 2 we 0.3x253+50 month 3 we have 0.3x(0.3x253+50)+50

  8. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    lets see the pattern after n months

  9. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    kk

  10. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    or you could just check if those options work

  11. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    check for first month n=1

  12. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oh they made n=0 the first month not n=1 let's check for n=0 do we get 253 for what option

  13. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A?

  14. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oh well all of them actually have f(0)=253 for n=0 do n=1 and check

  15. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok giv a sec

  16. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the right one has to have for n=1 f(1)=125.9

  17. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oh no error i used 253 instead of 235

  18. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    for n=1 we should get f(1)=120.5 not 125.9 that was a mistake ok

  19. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  20. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    A and B or not good since they don't work out

  21. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    same for D if you cheched

  22. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so C works as an answer

  23. emogirl100
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok thank you

  24. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    if you tried the find the pattern you would have gotten the same formula doing month 0 we have 235 month 1 we have 0.3x235+50 month 2 we have 0.3x(0.3x235+50)+50 and so on....

  25. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    f(0)=235 f(1)=0.3x235+50=0.3xf(0) f(2)=0.3x(0.3x235+50)+50=0.3xf(1)+50 f(3)=0.3xf(2)+50 we go following the pattern tell n f(n)=0.3xf(n-1)+50

  26. xapproachesinfinity
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @emogirl100

  27. 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.