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    caseyd's Avatar
    caseyd Posts: 1, Reputation: 1
    New Member
     
    #1

    May 24, 2010, 06:06 PM
    Answers to math word problems free
    ProfessorWilliamson counts his
    Midterm as 2/3 of the grade and his final as 1/3 of the grade.
    Wendy scored only 48 on the midterm. What range of
    Scores on the final exam would put Wendy’s average
    Between 70 and 79 inclusive?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
     
    #2

    May 25, 2010, 07:30 AM

    Solve for two values of F to give the high and low scores that get the final grade to 70 and 79:

    2/3 x 48 + 1/3 x F = 70
    2/3 x 48 + 1/3 x F = 79

    I think you'll find that Wendy is in trouble!
    harriscn's Avatar
    harriscn Posts: 1, Reputation: 1
    New Member
     
    #3

    Apr 23, 2011, 05:55 PM
    In 18 years, a family expects to need $86,000 for a child's college education. If they can invest at a rate of 6% per year, compounded monthly, how much do they need to deposit immediately to have sufficient funds 18 years from now?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
     
    #4

    Apr 24, 2011, 09:56 AM

    The formula for the total money after compound interest is added is:



    The interest is compounded annually, and you're given the time in years, so there is no problem here.

    Sum = 86000
    Principal = What you want to find
    Rate = 6
    time = 18

    Can you post what you get? :)

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