Ms. Feldman invested $10,000 for 1 year, part at 7% and part at 6.25%.
If she earned a total interest of $656.50, how much was invested at each rate?  Choices:
A) 4200 & 5800  B) 4600 & 5400  C) 9000 & 1000  D) 7000 & 3000  E) 6000 & 4000
Interest rate of 4200/- =294   Interest rate of 5800/- =362.50   4200 &amp; 5800nswer is 4200 &amp; 5800
<result>A</result>
Ms. Feldman invested $10,000 for 1 year, part at 7% and part at 6.25%.
If she earned a total interest of $656.50, how much was invested at each rate?