How to find nominal annual rate of interest/discount?












1












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1) at what nominal annual rate of interest, convertible four times a year will you quadruple your investment in $15$ years?



2) the annual nominal rate of interest compounded quarterly is $i^{(4)} = 0.08$. what is $d^{(2)}$, the equivalent nominal annual rate of discount compounded semiannually?




Sorry in advance, these are homework problems that I just can't get the right answers. for $1)$ I did $(1+i)^{4*15} = 4$ and get $i=0.023$, then did $(1+0.023)^4-1 = 0.0968$ but this is not the right answer. Also for $2)$ what I've done is since we know $1-d = frac{1}{1+i}$, $(1+frac{0.08}{4})^2 - 1 = 0.0404$ then i found $d$ to be $0.0388$ both wrong. How do i get the right interest/discount?










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  • $begingroup$
    What is the answer for 1)? Are you close so it might be a convention thing?
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:01












  • $begingroup$
    @spaceisdarkgreen i do not know the answer for either one
    $endgroup$
    – Allie
    Feb 16 '17 at 18:02










  • $begingroup$
    Reading the definition of nominal interest rate on wikipedia, I suspect that instead of doing $(1+.023)^4-1$ you should just do $.023*4=.0935$
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:04
















1












$begingroup$



1) at what nominal annual rate of interest, convertible four times a year will you quadruple your investment in $15$ years?



2) the annual nominal rate of interest compounded quarterly is $i^{(4)} = 0.08$. what is $d^{(2)}$, the equivalent nominal annual rate of discount compounded semiannually?




Sorry in advance, these are homework problems that I just can't get the right answers. for $1)$ I did $(1+i)^{4*15} = 4$ and get $i=0.023$, then did $(1+0.023)^4-1 = 0.0968$ but this is not the right answer. Also for $2)$ what I've done is since we know $1-d = frac{1}{1+i}$, $(1+frac{0.08}{4})^2 - 1 = 0.0404$ then i found $d$ to be $0.0388$ both wrong. How do i get the right interest/discount?










share|cite|improve this question









$endgroup$












  • $begingroup$
    What is the answer for 1)? Are you close so it might be a convention thing?
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:01












  • $begingroup$
    @spaceisdarkgreen i do not know the answer for either one
    $endgroup$
    – Allie
    Feb 16 '17 at 18:02










  • $begingroup$
    Reading the definition of nominal interest rate on wikipedia, I suspect that instead of doing $(1+.023)^4-1$ you should just do $.023*4=.0935$
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:04














1












1








1


1



$begingroup$



1) at what nominal annual rate of interest, convertible four times a year will you quadruple your investment in $15$ years?



2) the annual nominal rate of interest compounded quarterly is $i^{(4)} = 0.08$. what is $d^{(2)}$, the equivalent nominal annual rate of discount compounded semiannually?




Sorry in advance, these are homework problems that I just can't get the right answers. for $1)$ I did $(1+i)^{4*15} = 4$ and get $i=0.023$, then did $(1+0.023)^4-1 = 0.0968$ but this is not the right answer. Also for $2)$ what I've done is since we know $1-d = frac{1}{1+i}$, $(1+frac{0.08}{4})^2 - 1 = 0.0404$ then i found $d$ to be $0.0388$ both wrong. How do i get the right interest/discount?










share|cite|improve this question









$endgroup$





1) at what nominal annual rate of interest, convertible four times a year will you quadruple your investment in $15$ years?



2) the annual nominal rate of interest compounded quarterly is $i^{(4)} = 0.08$. what is $d^{(2)}$, the equivalent nominal annual rate of discount compounded semiannually?




Sorry in advance, these are homework problems that I just can't get the right answers. for $1)$ I did $(1+i)^{4*15} = 4$ and get $i=0.023$, then did $(1+0.023)^4-1 = 0.0968$ but this is not the right answer. Also for $2)$ what I've done is since we know $1-d = frac{1}{1+i}$, $(1+frac{0.08}{4})^2 - 1 = 0.0404$ then i found $d$ to be $0.0388$ both wrong. How do i get the right interest/discount?







finance






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asked Feb 16 '17 at 17:56









AllieAllie

794420




794420












  • $begingroup$
    What is the answer for 1)? Are you close so it might be a convention thing?
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:01












  • $begingroup$
    @spaceisdarkgreen i do not know the answer for either one
    $endgroup$
    – Allie
    Feb 16 '17 at 18:02










  • $begingroup$
    Reading the definition of nominal interest rate on wikipedia, I suspect that instead of doing $(1+.023)^4-1$ you should just do $.023*4=.0935$
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:04


















  • $begingroup$
    What is the answer for 1)? Are you close so it might be a convention thing?
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:01












  • $begingroup$
    @spaceisdarkgreen i do not know the answer for either one
    $endgroup$
    – Allie
    Feb 16 '17 at 18:02










  • $begingroup$
    Reading the definition of nominal interest rate on wikipedia, I suspect that instead of doing $(1+.023)^4-1$ you should just do $.023*4=.0935$
    $endgroup$
    – spaceisdarkgreen
    Feb 16 '17 at 18:04
















$begingroup$
What is the answer for 1)? Are you close so it might be a convention thing?
$endgroup$
– spaceisdarkgreen
Feb 16 '17 at 18:01






$begingroup$
What is the answer for 1)? Are you close so it might be a convention thing?
$endgroup$
– spaceisdarkgreen
Feb 16 '17 at 18:01














$begingroup$
@spaceisdarkgreen i do not know the answer for either one
$endgroup$
– Allie
Feb 16 '17 at 18:02




$begingroup$
@spaceisdarkgreen i do not know the answer for either one
$endgroup$
– Allie
Feb 16 '17 at 18:02












$begingroup$
Reading the definition of nominal interest rate on wikipedia, I suspect that instead of doing $(1+.023)^4-1$ you should just do $.023*4=.0935$
$endgroup$
– spaceisdarkgreen
Feb 16 '17 at 18:04




$begingroup$
Reading the definition of nominal interest rate on wikipedia, I suspect that instead of doing $(1+.023)^4-1$ you should just do $.023*4=.0935$
$endgroup$
– spaceisdarkgreen
Feb 16 '17 at 18:04










1 Answer
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$begingroup$

Nominal annual interest rate is defined to be the simple interest rate for a compounding period times the number of compounding periods in a year.



So, for the first one, you correctly get the quarterly interest rate of $i=0.023$ and the answer should just be four times that



For the second, I think you did everything right except you need to double the $d=0.0388,$ since they want the nominal annual discount whereas you computed the semiannual discount.






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    1 Answer
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    0












    $begingroup$

    Nominal annual interest rate is defined to be the simple interest rate for a compounding period times the number of compounding periods in a year.



    So, for the first one, you correctly get the quarterly interest rate of $i=0.023$ and the answer should just be four times that



    For the second, I think you did everything right except you need to double the $d=0.0388,$ since they want the nominal annual discount whereas you computed the semiannual discount.






    share|cite|improve this answer









    $endgroup$


















      0












      $begingroup$

      Nominal annual interest rate is defined to be the simple interest rate for a compounding period times the number of compounding periods in a year.



      So, for the first one, you correctly get the quarterly interest rate of $i=0.023$ and the answer should just be four times that



      For the second, I think you did everything right except you need to double the $d=0.0388,$ since they want the nominal annual discount whereas you computed the semiannual discount.






      share|cite|improve this answer









      $endgroup$
















        0












        0








        0





        $begingroup$

        Nominal annual interest rate is defined to be the simple interest rate for a compounding period times the number of compounding periods in a year.



        So, for the first one, you correctly get the quarterly interest rate of $i=0.023$ and the answer should just be four times that



        For the second, I think you did everything right except you need to double the $d=0.0388,$ since they want the nominal annual discount whereas you computed the semiannual discount.






        share|cite|improve this answer









        $endgroup$



        Nominal annual interest rate is defined to be the simple interest rate for a compounding period times the number of compounding periods in a year.



        So, for the first one, you correctly get the quarterly interest rate of $i=0.023$ and the answer should just be four times that



        For the second, I think you did everything right except you need to double the $d=0.0388,$ since they want the nominal annual discount whereas you computed the semiannual discount.







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered Feb 16 '17 at 18:21









        spaceisdarkgreenspaceisdarkgreen

        32.9k21753




        32.9k21753






























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