Solve the problem.Roberto invested some money at an APR of 8 percent, and then invested $4,000 more than twice this amount at an APR of 10 percent. His total annual income from the two investments was $4,600. How much was invested at 10 percent?
A. $30,000
B. $3,400
C. $34,000
D. $12,000
Answer: C
Mathematics
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B. 
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