At 1600 principal earns 7% interest compound semiannually twice per year after 33 years what is the balance in the account

A $1,600.00 principle earns 7% interest, compounded semiannually twice per year. After 33 years, what is the balance in the account. My answer is $112,992.00

The total amount of different books is 16.

Take away 1 from each, representing the same book they all read.

7 - 1 = 6 , 6 - 1 = 5 , 5 - 1 = 4

Add the three together.

6 + 5 + 4 = 15

Add that one book everyone read.

15 + 1 = 16 different books.

Hope I helped you out.