Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

britbrat4290

  • one year ago

PLZ HLP!:) The weekly sales in thousands of items of a product has a seasonal sales record approximated by (t is time in weeks with t = 1 referring to the first week in the year). During which week(s) will the sales equal 96,990 items?

  • This Question is Closed
  1. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. Coolsector
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ok so what did you try to do ?

  3. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im ost in this cant u cant lol im forced to take a high school calc class and this isnt even calc fml i just cant fail this last test

  4. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    lost

  5. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i know how to plug in formulas thats about it to be honest

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

    im sorry to hear that :( anyway you have this equation that you gave me it describes the amount of itmes for a given t (week)

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

    you look for a certain amount of items and find the corresponding t

  8. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  9. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    plug in one for t for everything

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

    no, you want to find t

  11. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im 23 this is sad

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

    im 23 as well .. it is fine

  13. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but i thought it says t=1 in the problem

  14. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    :)

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

    no, they say that t=1 means the first week

  16. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ahh gotcha

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

    now when you find t , for example if you find t = 10 you know that it is the 10th week in year

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

    now, you got the equation : n=84.59 + 24.8sin(pi*t/24)

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

    and they ask you for what weeks n = 96,990

  20. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i got undefined ...

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

    so you have to solve: 96,990 = 84.59 + 24.8sin(pi*t/24) i guess here 84.59 means 84590 and 24.8 means 24800

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

    so it is really should be : 96.99 = 84.59 + 24.8sin(pi*t/24)

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

    since they say "n is in thousands of items"

  24. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    im getting a crazy calculation

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

    why, look: 96.99 = 84.59 + 24.8sin(pi*t/24) 12.4 = 24.8sin(pi*t/24) 0.5 = sin(pi*t/24)

  26. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    week 4, week 20, and week 52?

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

    wait ill check :)

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

    0.5 = sin(pi/6) so : sin(pi/6) = sin(pi*t/24) 1. pi*t/24 = pi/6 + 2pi*k t = 4 + 48*k t = 4 , 52 2. pi*t/24 = pi - pi/6 + 2pi*k t = 20 + 48*k t=20 so yes! 4 20 52

  29. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yay ur being my life saver right now!!!

  30. britbrat4290
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    THANK U SOO MUCH

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

    yw :))

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

    Search OpenStudy
    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.