Formula to be entered in year 1:
Where,
P = Initial Investment Principal
r = APR
n = number of times interest is compounded (i.e semiannually is 2,
quarterly is 4, etc)
t = time in years
Part 1:
In the given scenario,
P = 350
r = 0.015
n = Semiannually i.e 2
t = 22 months i.e 1.8334 years
Therefore formula is:
Therefore, value after 22 months is = $359.72
Time taken to double initial investment is
Therefore, we know that A = 2*350 (i.e double)
Therefore, using the same main equation as above, we can arrive at
as T is the time which we have to find
at this stage, we need to apply log. Therefore we will arrive at
Log 2 = 0.301 and log 1.0075 = 0.0032
That is 47 years and 0.38 months (11 days)
APY is computed by the following formula
where,
r= annual interest rate i.e 1.5% or 0.015
n = number of times interest is compounded (i.e semiannually is
2)
Therefore, we can compute APY as follows:
or 1.506%
Part 2:
In the given scenario,
P = 350
r = 0.015
n = Quarterly i.e 4
t = 22 months i.e 1.8334 years
Therefore formula is:
Therefore, value after 22 months is = $359.74
Time taken to double initial investment is
as T is the time which we have to find
at this stage, we need to apply log. Therefore we will arrive at
Log 2 = 0.301 and log 1.00375 = 0.00163
That is 46 years and 2 months
APY is computed by the following formula
where,
r= annual interest rate i.e 1.5% or 0.015
n = number of times interest is compounded (i.e Quarterly is 4)
Therefore, we can compute APY as follows:
or 1.508%
Part 3:
In the given scenario,
P = 350
r = 0.015
n = Monthly i.e 12
t = 22 months i.e 1.8334 years
Therefore formula is:
Therefore, value after 22 months is = $359.75
Time taken to double initial investment is
as T is the time which we have to find
at this stage, we need to apply log. Therefore we will arrive at
Log 2 = 0.301 and log 1.00125 = 0.00054
That is 46 years and 6 months
APY is computed by the following formula
where,
r= annual interest rate i.e 1.5% or 0.015
n = number of times interest is compounded (i.e Monthly is 12)
Therefore, we can compute APY as follows:
or 1.510%
Part 4:
In case of compounded continuously, the formula to be entered is year 1 is
Where,
P = Initial Investment Principal i.e 350
e = Mathematical constatnt
r = APR i.e 1.5% or 0.015
t = time in years i.e 1.8334 years
Therefore,
the value of e^0.0275 = 1.02788
Therefore,
The simplified formula to compute time taken to double investment in case of continuous compounding is
the value of ln(2) = 0.693
r = 0.015
therefore,
years
APY is computed by the following formula
the value of e^0.015 = 1.01511
or 1.511%
the answers i already have are probably wrong. please correct if so. thank you!!! Suppose that...
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