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An engineer invested  in a six-month savings certificate that paid a simple annual interest rate of . After six months, she invested the total value of her investment in another six-month certificate. After six more months, the investment was worth . If the annual interest rate of the second certificate is  then what is 

 Feb 11, 2021
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Sorry.....mising all of the important numbers ! cheeky

 Feb 11, 2021

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