1a) Lucy invested $950 five years ago. Her investment paid 7.2% interest compounded monthly. Lucy's twin sister Laurie invested $900 at the same time. But Laurie's investment earned 8% interest compounded quarterly. How much is each investment worth today?
1b) Carl is considering the purchase of an investment that will pay him $12,500 in 12 years. If Carl wants to earn a return equal to 7% per year (annual compounding), what is the minimum amount he should be willing to pay for the investment today?
a.
Lucy:
We use the formula:
A=P(1+r/1200)^12n
where
A=future value
P=present value
r=rate of interest
n=time period.
Hence
A=$950(1+0.072/12)^(12*5)
=$950*1.431788412
=$1360.20(Approx).
Laurie:
We use the formula:
A=P(1+r/400)^4n
where
A=future value
P=present value
r=rate of interest
n=time period.
Hence
A=$900(1+0.08/4)^(4*5)
=$900*1.485947396
=$1337.35(Approx).
b.
Present value of inflows=cash inflow*Present value of discounting factor(rate%,time period)
=$12500/1.07^12
=$12500*0.444011959
which is equal to
=$5550.15(Approx).
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