Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

S

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

    b) instant rate = f' (3)

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

    Ok got it! Thank you!

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

    Thanks for helping me to make it so simple ;)

  7. S
    • 2 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.

    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.