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

burhan101

Velocity = 9t²-81t+162 At what time,t, is the velocity not changing?

  • 10 months ago
  • 10 months ago

  • This Question is Closed
  1. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    find its vertex

    • 10 months ago
  2. julian25
    Best Response
    You've already chosen the best response.
    Medals 0

    but really the velocity is not changing there?

    • 10 months ago
  3. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1371752495017:dw|

    • 10 months ago
  4. burhan101
    Best Response
    You've already chosen the best response.
    Medals 0

    0= 9t²-81t+162 ? @ganeshie8

    • 10 months ago
  5. julian25
    Best Response
    You've already chosen the best response.
    Medals 0

    yes the rate of change there is 0

    • 10 months ago
  6. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    @burhan101 look up formula for "vertex of parabola"

    • 10 months ago
  7. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    vertex occurs at \(\frac{-b}{2a}\)

    • 10 months ago
  8. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    a = 9 b = -81 just plugin

    • 10 months ago
  9. burhan101
    Best Response
    You've already chosen the best response.
    Medals 0

    x=9/2

    • 10 months ago
  10. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    correct ! thats the time when verlocity becomes 0

    • 10 months ago
  11. ganeshie8
    Best Response
    You've already chosen the best response.
    Medals 1

    *velocity

    • 10 months ago
  12. burhan101
    Best Response
    You've already chosen the best response.
    Medals 0

    4.5

    • 10 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.