ChrisV
320.17  (6101.4/1.8)



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ChrisV
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Answer in proper significant figures.

ChrisV
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ive tried to answer this four times and missed it all 4 times

ChrisV
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missing something i guess

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yes i understand that

ChrisV
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i know when i multiply I take the smallest amount of sig fig

ChrisV
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and when i add or subtract i take the number of least certainty in common

ChrisV
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its when i do both im getting confused

ChrisV
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i assume i do the parenthesis first

ChrisV
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which comes out to 3389.67

ChrisV
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do i round that to two sig figs or subtract first?

ChrisV
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so the first answer is 3400

ChrisV
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then i take 302.17  3400

ChrisV
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3097.83 or 3098 in sig fig

ChrisV
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well its supposed to be 320.17

ChrisV
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so 3079.83 which would be 3080 in sig fig?

ChrisV
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which i tried that answer and it marked me wrong >.<

ChrisV
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Submitted Answers
ANSWER 1: Deduction: 3%
320.17  (6101.4/1.8) =
3069.50
ANSWER 2: Deduction: 3%
320.17  (6101.4/1.8) =
3079.83
ANSWER 3: Deduction: 3%
320.17  (6101.4/1.8) =
3080
ANSWER 4: Deduction: 3%
320.17  (6101.4/1.8) =
3070

ChrisV
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yes but when you subtract dont you take the last significant decimal place to them both?

ChrisV
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could you show me how you would solve this so i may understand?

ChrisV
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i swear to you im not trying to get anyone to do my homework, but this is frustrating me and i have two more attempts >.<

ChrisV
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yes i understand that

ChrisV
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but here i divide first

ChrisV
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which gives me two sig figs

ChrisV
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33.89.67 = 3400 right?

ChrisV
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3389.67 oops

ChrisV
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then i take 320.17 and subtract 3400

ChrisV
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since 3400 has no decimal spots i round to the nearest 1 spot

ChrisV
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and that how i got 3080

ChrisV
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oh so the two sig figs i get when dividing applies still after i subtract?

ChrisV
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for some reason i thought when i rounded to 3400 i was done with the division part

ChrisV
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but 3400 is ambiguous huh

ChrisV
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still 2 figs

ChrisV
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would it be 3100 or 3100?

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you are my hero, thanks a lot!

ChrisV
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most certainly did

ChrisV
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now i have to do the other three parts of the question but at least I understand a little more

ChrisV
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well i understand mult/div and add/subt.... a little confused when they use both together

ChrisV
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my book sucks at explaining! and thanks for the pdf

ChrisV
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well its a custom made book for my college made by pearson

ChrisV
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Just says Chem 121 College of Southern Nevada

muhammad9t5
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first solve the bracket and then do subtraction and finnaly the rules of significant.