We invested a total of $1,000. We invested one part of the money at 4% and the rest of the money at 6%. The total investment with interest at the end of the year was $1,046. How much money did we invest at 4%?  Choose the most appropriate option:
A) $600
B) $650
C) $700
D) $750
E) $800
Let x be the money invested at 4%.   1.04x+1.06(1000-x)=1046.   0.02x=1060-1046.   0.02x=14.   2x=1400.   x=700.   The answer is $700.
<result>C</result>
We invested a total of $1,000. We invested one part of the money at 4% and the rest of the money at 6%. The total investment with interest at the end of the year was $1,046. How much money did we invest at 4%?