A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 4 years ago

A bacteria culture begins with 4 bacteria which double in size every hour. How many bacteria exist in the culture after 8 hours?

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

    How many exist is 1 hour?

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

    Write n(0) = the number at the beginning. We have n(0) = 4 What's n(1) = # at hour 1?

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

    n(1) = 2 x 4 = 8 because the number of bacteria doubles every hour. Now, what is n(2) ? I'm asking you this so you can get to a formula for n(8).

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

    @kirihara, talk to me.

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

    initial no. of bacterias=4 common ratio(divison)=2 bacterias after 8hrs= ar^n=4x2^8..............rest is calculations..

  6. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hey if they doubles its size then after 8 hrs we will be left with those 4 large becterias only!!............there is difference between doubling in size and divison

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

    Never mind found out! XD the answer is 1024 you do (4)(2)^8 the two comes from doubling each hr

  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

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.