Ans 5) Two year return will be given by following formula:
Return = (1 + interest rate/compounding period)^(n*compounding period) - 1
in case of option A.
return = (1 + .06/1)^(2*1) - 1
= 1.1236 - 1
= 12.36%
in case of option B
return = (1 + .059/4)^(2*4) - 1
= 1.124275 - 1
= 12.43%
Thus option B will give better return.
Ans 6) let the price of cedi will be double in n years
to find the value of n we will use following formula
2 = (1 + inflation rate)^n
2 = (1 + .15)^n
log (2) = n * log(1.15)
n = 4.96 years
thus the price will be double in 4.96 years (approx 5 years).
ans 7) Continuous compounded amount to be paid back can be given by following formula:
Amount = principal * e^(n*r)
where principal = $10500
r = 4%
n = 5 yrs
Amount = 10500 * e^(5*.04)
= $12824.73
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