You want to make a one-time deposit into a bank account today
and have $2,000 in the account in five years.
Which interest rate requires you to deposit the least
amount of money into the account today?
Show your work.
a.) 1%
b.) 8%
c.) 5%
d.) 4%
B) 8%
Explanation: The higher the interest rate , lower will be the present value of the amount along with the money to be deposited today.
Rate = 1%
Pv= Future value / (1+r)^n
= 2,000 / (1.01)^5
= 2,000 / 1.051
= $1,902.93
Rate = 8%
Pv= Future value / (1+r)^n
= 2,000 / (1.08)^5
= 2,000 / 1.4693
= $1,361.66
Rate = 5%
Pv= Future value / (1+r)^n
= 2,000 / (1.05)^5
= 2,000 / 1.2763
= $1,567.03
Rate = 4%
Pv= Future value / (1+r)^n
= 2,000 / (1.04)^5
= 2,000 / 1.2167
= $1,643.78
As we can see from the above calculation, the least amount of present value of amount $2,000 is at 8% interest rate. So, we should deposit at 8% to get 2,000 at the end of year 5 .
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