Mu$$strame c$$mo resolver Future value$$You have $$$$200$ to invest. If you can earn $12\%$interest$,$ about how long does it take for your $$$$200$ investment to grow to $$$$400?$ Suppose the interest rate is just half$$ that, at $6\%.$ At half the interest$$ rate, does it take exactly twice as long to double your$$ money? Why or why$$ not? How long does it$$ take?

$$If the annual interest rate is $12\%,$ the number of years it takes to double your money is

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