Waiting period. Susan Norman seeks your financial advice. She wants to know how long it will take her to become a millionaire. She tells you that

she has $$1,757$ today and wants to invest it in an aggressive stock portfolio. The historical return on this type of investment is $18\%$ per year. How long

will she have to wait if the $$1,757$ is the only amount she invests and she never withdraws from the market until she reaches her $$1$ million? $($Assume

no taxes on the earnings.$)$ What if the rate of return is only $13\%$ annually? What if the rate of return is only $9\%$ annually?

How long will Susan have to wait to become a millionaire if she invests $$1,757$ today at an annual rate of return of $18\%?$

years $($Round to two decimal places.$)$