Start with the compound interest formula
Plug in p=270, r=0.15 (divide 15 by 100 to get 0.15), n=1, and t=3
Divide 0.15 by 1 to get 0.15
Multiply the exponents 1 and 3 to get 3
Add 1 and 0.15 to get 1.15
Raise 1.15 to the 3 th power to get 1.520875
Multiply 270 and 1.520875 to get 410.63625
So if you invest $270 at an interest rate of 15%, which is compounded 1 times a year for 3 years, the return is about $410.64 (which is rounded to the nearest cent) |