Student needs $1,000 in 4 years what mushy invest today if her investment earns 4% annual interest compounded quarterly

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?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

The anwser cause i do not understand just plez