At an interest rate of 8% compounded annually, how long will it take to double the following investments? $50 $500 $1700

Let's see, if the first one has a Principal of $50, when it doubles the accumulated amount will then be $100,

recall your logarithm rules for an exponential,







now, for the second amount, if the Principal is 500, the accumulated amount is 1000 when doubled,





now, for the last, Principal is 1700, amount is then 3400,