(12,000)(0.039/1-(1+0.039)^-30
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because it's 12000[0.039/(1-(1+0.039)^-30)]
work each part individually if it's easier for you that way and you'll get 685.559995 which is 685.56 to 2 d.p.
work each part individually if it's easier for you that way and you'll get 685.559995 which is 685.56 to 2 d.p.
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Part of the problem that the brackets are unbalanced. You have (12 000)(0.039/1-(1+0.039)^-30. Where is the closer for the bracket that opens after (12 000)? The location of this item can seriously change the answer. Check the original question and also make sure that there is nothing else missing.
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You can't!
http://www.wolframalpha.com/input/?i=-3340.156776097382528242427673958435825615488140903689862384&lk=1&a=ClashPrefs_*Math-
http://www.wolframalpha.com/input/?i=-3340.156776097382528242427673958435825615488140903689862384&lk=1&a=ClashPrefs_*Math-