A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Bossvideogamer21

  • one year ago

do i cross cancel using division?

  • This Question is Closed
  1. Bossvideogamer21
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    here is the problem: Scientists can estimate the amount of bacteria in a refrigerated food by using the formula 0.2b=T^2/20 where b is the number of bacteria and t is the number of seconds. What is the approximate time a food was in the refrigerator if there are 625 bacteria?

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

    \(0.2 \times 625 = T^2/ 20 \\ \implies T^2 = 0.2 \times 625 \times 20 = ....\)

  3. hartnn
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so in which step you had that doubt?

  4. Bossvideogamer21
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i did everthing right except setting up the problem

  5. hartnn
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so we just plug in b = 625 in the given formula and multiply both sides by 20

  6. hartnn
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    to eliminate the fraction (division by 20) on right

  7. Bossvideogamer21
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i got everything except the divide by 20 part

  8. Bossvideogamer21
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so is this right : in seconds the answer is 2,500 and in minutes the answer is 41.6

  9. hartnn
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1442702290157:dw|

  10. hartnn
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    T^2 is 2500 so T = 50 seconds :)

  11. 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.