SOLUTION: An investment fund that pays quarterly dividends for 10 years yields an annual return of 6.6%. If the initial price of the fund is $200, what is the amount of the dividend?

This investment fund, in other terms, is a sinking fund, which provides regular payouts
quarterly and is compounded quarterly at the nominal compounding rate of 6.6% per year.
The fund works in this mode during 10 years. After 10 years, the fund is empty.


The problem's formulation is INCOMPLETE, since it does not say if the fund makes payments
at the end or at the beginning of each quarter. The formulas to calculate future values
of such sinking fund are DIFFERENT in these cases. In my solution below, I will assume
that the payments are at the end of each quarter.


For such sinking fund, the formula which connects the starting amount X and the quarterly 
payment Q is 

    X = .    (1)


In this formula, Q is  the regular withdrawal per quarter;  the factual quarterly compounding rate 
is  r = ,  p = 1 + r = , and the number of payment periods  is n = 10 years * 4 quarters = 40. So


    200 = .    (2)


The unknown is the value of quarterly payments Q.
In this formula, we can calculate the factor (multiplier)

     = 29.11257449.


Then  from formula (2)  Q =  = 6.869883668.


We round it to the closest cent and get the


ANSWER.  The quarterly payment out is 6.87 dollars.