SOLUTION: 1. How much must you deposit at the end of each of the next 12 years in a savings account paying 10% annually in order to have $1 million saved by the end of those 12 years?

It is a classic Ordinary Annuity saving plan. The general formula is 


    FV = ,   


where  FV is the future value of the account;  P is annual payment (deposit); r is the annual percentage yield presented as a decimal; 
n is the number of deposits (= the number of years, in this case).


From this formula, you get for for the annual payment 


    P = .     (1)


Under the given conditions, FV = $1,000,000;  r = 0.1;  n = 12.  So, according to the formula (1), you get for the annual payment 


    P =  = $46,763.32.


Answer.  The necessary annual deposit value is $46,763.32.


Note that of projected $1,000,000 the total, you will deposits only  10 times $46,763.32, i.e. 10*46,763.32 = 467633.2 dollars.
The rest is what the account will earn/accumulate/accrue in 10 years.