Ineed with this question: the cost for a certain music plan is $9.99 per year plus $0.25 per song you download. if you paid $113.74 one year find the number of songs you downloaded.

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?