umm,if you are in english math,please help me with my math homework!
1.principal:$400 interest rate:7% compounded:annually time(years):3 balance:(find the s)
2.principal:$8,000 interest rate:5% compunded:annually time(years):9
3.principal:$1,200 interest rate:4% compounded:semi-annually time(years):2
4.principal:$50,000 interest rate:6% compounded:semi-annually time(years):6
umm,the answer not the equation please.because i don't get your equation...