1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Arithmetric and Geometric Series

  1. Apr 29, 2012 #1
    1. The problem statement, all variables and given/known data


    A ) A company produces microchips. It has some in storage and produces 34 an hour. After 1 hour it has a total of 3428 microchips
    i) How many chips will the company have a week later, assuming the production continues 24 hours a day?

    ii)An order is put in for 13,526 chips. In days and hours, how long will it take before the order can be met?



    3. The attempt at a solution

    i) a= 3428-34= 3396

    d= 34

    n= 1 week time = 604800



    1 week

    60.60.24.7=604800




    Un=a+(n-1)d


    Un=3396+ (604799.34)

    = 20566596



    ii) Is it? 20566596/13526 = 1520 1 day
     
  2. jcsd
  3. Apr 29, 2012 #2
    How many hours in a week? (24 x 7) = 168 hours.

    You need to first calculate how many chips they can produce in 1 day (24 hours). From that you can subtract from the total chips to find how much was in storage.

    That's a starting point.
     
  4. Apr 29, 2012 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    ?? There are 7 days in a week, 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute so there are 605800 seconds in a week. But you are told that you are producing 34 chips an hour. Why are you multiplying by the number of seconds? You are producing 34 chips per hour for 24(7)= 168 hours.


     
  5. May 22, 2012 #4
    Sorry for not replying earlier.

    take 2:

    24.7 = 168 hours

    U= a + (n-1) d

    u= 3428 + (168-1) 34

    u= 9106




    b)ii)An order is put in for 13,526 chips. In days and hours, how long will it take before the order can be met?


    I know you have to use the formula Sn= 1/2 n (2a + (n-1))d


    Is sn= 13526


    13526= 0.5 n (

    but then I am lost
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Arithmetric and Geometric Series
  1. Geometric Series (Replies: 7)

  2. Geometric series (Replies: 1)

  3. Geometric Series (Replies: 4)

  4. Geometric series (Replies: 5)

  5. Series (Geometric?) (Replies: 5)

Loading...