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Scientific Calculator issues

  1. Oct 21, 2009 #1
    1. The problem statement, all variables and given/known data
    PV = PMT *1-(1+i)^-n / i
    PV = 225 * 1- (1+.0055)^-42 / .005
    PV = 8417.37

    How did they get this. how do you use a negative exponent on a scientific calculator.







    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 21, 2009 #2
    sorry for not using ? How did they get this? How do you use a negative exponent on a scientific calculator?
     
  4. Oct 21, 2009 #3

    Mark44

    Staff: Mentor

    Does your calculator have a Change Sign button? They are sometimes marked +/-.
     
  5. Oct 21, 2009 #4
    No it does not I have a texas instruments TI-30x IIS model scientific calculator with 2 lines
     
  6. Oct 21, 2009 #5

    Mark44

    Staff: Mentor

  7. Oct 21, 2009 #6

    thx alot
     
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