Question 356969
Roopa Patel won a prize for her sculpture.  She invested part of the money in a certificate of deposit at 4% and $3000 more than that amount in a bond paying 6%.  Her annual interest income was $780.  How much did Roopa invest at each rate?
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$ x in CD @ 4%
$(x+3000) in bond @ 6 %
total interest income in 1 year was $780
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Interest equation
0.04x+0.06x(x+3000)= 780
0.04x+0.06x+180 = 780
0.1x = 780-180
0.1x=600
x=600/0.1
x= $6000 @ 4%
$3000 more @6%
6000+3000=$9000 @6%
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m.ananth@hotmail.ca