SOLUTION: Mona invests $300 at 4% yearly interest. How much does she have to invest at 9% so that the total yearly interest from the two investments exceeds $48?

Question 591051: Mona invests $300 at 4% yearly interest. How much does she have to invest at 9% so that the total yearly interest from the two investments exceeds $48?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Mona invests $300 at 4% yearly interest. How much does she have to invest at 9% so that the total yearly interest from the two investments exceeds $48?
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Interest1: 300*0.04 = 12
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Equation:
0.09x + 12 > 48
0.09x > 36
x > $400
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Cheers,
Stan H.
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