Jon has $5,000 to invest in a savings account that has interest compounded annually. If he wants his money to double in eight years, what percent must the interest rate be on the account?
He will be looking at this scenario
10,000 = 5000 (1+i)^8
10000/5000 = (1+i)^8
2 = (1+i)^8 take the 8th root of both sides
1.0905 = 1 + i
.0905 = i or 9.05 % annual compounded annually