SOLUTION: A $5000 investment at an annual simple interest rate of 3.9% earned as much interest after one year as another investment in an account that earned 6.5% annual simple interest. How
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Question 707255: A $5000 investment at an annual simple interest rate of 3.9% earned as much interest after one year as another investment in an account that earned 6.5% annual simple interest. How much was invested at 6.5%? Answer by jim_thompson5910(35256) (Show Source):
You can put this solution on YOUR website! The $5,000 invested at 3.9% simple interest gets you 5000*0.039*1 = 195 dollars in interest alone.
Some other amount, call it x dollars, is invested at 6.5% simple interest for a year. This x dollar investment at 6.5% simple interest will earn 195 dollars in interest alone because the problem states that the two investments earned the same amount of interest.
So
I = Prt
195 = x*0.065*1
195 = 0.065x
0.065x = 195
x = 195/0.065
x = 3000
Which means that 3000 dollars was invested at 6.5% simple interest.