A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Help please....... A computer can perform c calculations in s seconds. How many minutes will it take the computer to perform k calculations? a. 60ks/c b. ks/c c. ks/60c d. 60c/ks e. k/60cs

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    60 sec in 1 min so i think its not b

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i know the answer i want to know how to do it.

  3. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The speed of calculations is: \(speed ~of~ calculations = \dfrac{calculations}{time} \) \(speed ~of~calculations = \dfrac{c}{s} \dfrac{calculations}{second} \) \(time = \dfrac{calculations}{speeedd~of~calculations} \) \(\dfrac{1 ~minute}{60 ~seconds} = 1\) \(time = \dfrac{k~calculations}{\frac{c~calculations}{s~seconds}} = \dfrac{ks}{c} seconds \times \dfrac{60~seconds}{1~minute} = \dfrac{60ks}{c} per ~minute\)

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

    ***A computer can perform c calculations in s seconds. How many minutes will it take the computer to perform k calculations?**** we are given a rate c calcs per s seconds rate*time = amount so \[ \frac{c \ calcs}{s \ secs} \cdot t = k \ calcs\] solve for t \[ t = \frac{k\ s \ secs}{c} \] that is the time in seconds. if we mutliply by 1 minute/60 secs \[ t = \frac{k\ s}{c} \ \cancel{seconds} \cdot \frac{1 \ minute}{60 \ \cancel{seconds}}\\ t= \frac{k s}{60c} \ mins \]

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

    mathstudent messed up the conversion from seconds to minutes.

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

    Is that a formula? The speed of calculations thing he mentioned?

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

    rate * time = distance is a formula you learn to figure out how far you go at a given speed. but many problems are similar to this, and can use the same idea when I see amount per time I think "rate" and see if rate * time = amount makes sense. (It usually does)

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ohh okay i see

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1440458170535:dw|

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i got that far

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't understand from there to be honest

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

    what does "x" represent in your ratio?

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    # of calculations per minute

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

    good. so x is a rate: calculations per minute so use rate * time = amount we know the rate. we are given an amount (k) so we can find time , and it will be in minutes.

  15. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ohhhhhh okay got it

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

    it takes practice to think "clearly". Lots of practice.

  17. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yea lots of practice ^_^ thanks phi!!

  18. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @phi Thanks for pointing it out. \(time = \dfrac{k~calculations}{\frac{c~calculations}{s~seconds}} = \dfrac{ks}{c} \cancel{seconds} \times \dfrac{1~minute}{60~\cancel{seconds}} = \dfrac{ks}{60c} ~minute\)

  19. 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.