SOLUTION: if money can earn 4.0% compounded monthly, how long will it take you to accumulate $ 1 million in your RRSP if you contribute $1440 at the end of each month?

Use the formula for an Ordinary Annuity saving account compounded monthly 


    FV = 


where FV is the future value, P is the payment at the end of each month, 
r is the interest rate per year expressed as decimal, 
n is the number of monthly deposits (of months).


So, we need to find " n " from this equation


     =  =  = 694.4444444
, 

     = . 


Rewrite it in this form

     = 2.314815,

     = 1 + 2.314815 = 3.314815.


Take logarithm base 10 of both sides

    n*log(1+0.04/12) = log(3.314815)


and calculate  

     n =  = 360.1194131 months.


Round it to the closest greater month, which is 361 months, 
in order for the bank would be in position to compete the last compounding.

361 months is the same as 30 years and 1 month.


ANSWER.  361 months, or 30 years and 1 month.