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Math Help - interest - graph on calculater and effective yield

  1. #1
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    interest - graph on calculater and effective yield

    i need some help...

    compare saving plans: for instance, you deposit $1000 in a savings account and the following options are given:

    a. 6.2% annual interest rate, compounded annually
    b. 6.1% annual interest rate, compounded quarterly
    c. 6.0% annual interest rate, compounded continuously

    1) Use a graphing utility to graph all three functions in the same viewing window. Can you find a viewing window that distinguishes among the graphs of the three functions? If so, describe the viewing window.
    >how to put that in the calculater?(ti-84 plus)
    >is there a window which shows that?


    2) The effective yield of a savings plan is the percent increase in the balance after 1 year. Find the effective yields for three options listed above. How can the effective yield be used to decide which option is best?



    thank you
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  2. #2
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    Quote Originally Posted by shirel
    i need some help...

    compare saving plans: for instance, you deposit $1000 in a savings account and the following options are given:

    a. 6.2% annual interest rate, compounded annually
    b. 6.1% annual interest rate, compounded quarterly
    c. 6.0% annual interest rate, compounded continuously
    I remember you asked similar questions to this before. Did you at least try to do these?

    a. P(x)=1000(1.062)^x
    b. P(x)=1000(1.01525)^{4x}
    c. P(x)=1000e^{.06x}


    b.Is best
    c.Is worst
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