SOLUTION: Find how long it takes a ​$1200 investment to earn ​$600 interest if it is invested at 5​% interest compounded quarterly.

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Question 1157482: Find how long it takes a ​$1200 investment to earn ​$600 interest if it is invested at 5​% interest compounded quarterly.
Answer by greenestamps(13200)   (Show Source): You can put this solution on YOUR website!


$600 interest means the original $1200 has grown to $1800.

If t is the number of years and the interest is 5% compounded quarterly, then



Graph using a graphing calculator, or solve using logarithms....




You can finish....


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