Quantitative Reasoning

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  • #51013

    Lucie Mingla
    Participant

    Please show a complete solution for question 5 given today in class and share it with each other. Critic each other’s work.
    Every one of you must participate.

    #51069

    Devorah Rappaport
    Participant

    5.
    A. How many total jobs were there in the private sector in N.Y. in 2010?

    2.4 11,145 2.4x 11,14500
    _ = _ = _ = _
    100 x 2.4 2.4

    464,375 jobs in total in the private sector in 2010

    B.How many green jobs in the private sector were expected by 2012?

    percent increase until 2012 is the .26 and the total jobs that were in the private sector was 464,375.

    .26 x 464,375 = 120,737.5

    120,737.5 + 464,375 = 585,112.5 is the jobs expected by 2012

    c. In the overall job market was projected to increase by 4.3%, what percentage of total private- sector jobs was projected to be green by 2012?

    .43 x 585,112.5 + 25,159.84 (increase) = 610,272.34

    610,272.34-464,375
    _
    464,375 The answer is 3%. I first took the percentage that it went up by and times it by the jobs
    expected by 2012 plus the increase. Then took the total and did the find the percent increase
    method.

    #51070

    Christina Wang
    Participant

    Devorah can you retype the calculation for question 1, I can’t understand how you did it because there’s no signs showing how you multipled or anything like that

    #51071

    Christina Wang
    Participant

    I don’t understand why you multiplied 2.4 with 100.

    #51072

    Devorah Rappaport
    Participant

    5.
    A. How many total jobs were there in the private sector in N.Y. in 2010?

    2.4 divide by 100 = 11,145 divided by x 2.4x divided by 2.4 equals 11,14500 divided by 2.4

    The answer is 464,375 jobs in total are in the private sector in 2010

    B.How many green jobs in the private sector were expected by 2012?

    percent increase until 2012 is the .26 and the total jobs that were in the private sector was 464,375.

    .26 x 464,375 = 120,737.5

    120,737.5 + 464,375 = 585,112.5 is the jobs expected by 2012

    c. In the overall job market was projected to increase by 4.3%, what percentage of total private- sector jobs was projected to be green by 2012?

    .43 x 585,112.5 + 25,159.84 (increase) = 610,272.34

    610,272.34-464,375
    _
    464,375 The answer is 3%. I first took the percentage that it went up by and times it by the jobs
    expected by 2012 plus the increase. Then took the total and did the find the percent increase
    method.

    #51073

    Christina Wang
    Participant

    Ohhh I understand now. I confused myself with this question. Instead of doing that I actually did 11145 multipled by .024, assuming they were looking for 2.4% in the amount of jobs in 11145, getting 267.48.

    #51074

    Devorah Rappaport
    Participant

    I divided the 2.4 by 100. The method I used is trying to show 2.4 percent out of 100 is equal to the 11, 145 over x ( which is the unknown total jobs). It is cross multiplication and divide the number next to x on both sides.

    #51075

    Christina Wang
    Participant

    Is it possible I can see a photo of your work?

    #51076

    Christina Wang
    Participant

    I should’ve known, thank you! I forgot cross multiplication even though we used this so many times in class.

    #51077

    Devorah Rappaport
    Participant

    I tried for over 2 hours to try and attach a photo. Unfortunately I am unable to. But I can answer any questions to the best of my capabilities.

    #51078

    Devorah Rappaport
    Participant

    No worries. It is hard to depict sometimes which method in math to use

    #51079

    Devorah Rappaport
    Participant

    may I ask you how you are able to see everyones work? I have been searching and can’t see anyones work

    #51080

    Christina Wang
    Participant

    I don’t know, I only saw yours. Can you see my work?

    #51081

    Devorah Rappaport
    Participant

    I can’t see your work unless yous send me it through this reply section. I don’t know why I tried finding your work as well but it didn’t show me

    #51082

    Christina Wang
    Participant

    That’s weird, I can’t send it through here since I’m on my phone. Maybe on desktop you’ll see.

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