Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

S

  • 3 years ago

After an advertising campaign, the sales of a product often increase and then decrease. Suppose that t days after the end of the advertising the daily sales are, f(t) = - 6t^2 + 64t + 105 units. a) What is the average rate of growth in sales during the fourth day that is from time t = 3 to t = 4. b) In what instantaneous rate are the sales changing when t=3?

  • This Question is Closed
  1. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    For a do you take a derivative and then plug in 3 and 4 and find the difference or what ?

  2. Chlorophyll
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a) Avg = [ f (4) - f(3) ] / ( 4 -3) = f (4) - f(3)

  3. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    MMmm ok.. so just a difference with no derivative. Ok thanks! What about b?

  4. Chlorophyll
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    b) instant rate = f' (3)

  5. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok got it! Thank you!

  6. Chlorophyll
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Thanks for helping me to make it so simple ;)

  7. S
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    No problem.. hehe =D

  8. 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