What initial investment would I have to make at 6% per year compounded semi-annually in order to end up with $1,000,000 in 29 years if I didn't make any monthly contributions.

a) estimate using the rule of 72. Explain how you came up with your estimate.
b) calculate exactly.

1 answer

a) ... they still use that ??

b) x(1.03)^58 = 1000000
x = $ 180,069.84