10. On January 1, 2015, Anna invested $5,000 at 5% interest for one year. The CPI on January 1, 2015
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10. On January 1, 2015, Anna invested $5,000 at 5% interest for one year. The CPI on January 1, 2015 stoodat 2.37. On January 1, 2016, the CPI was 2.40. The real rate of interest earned by Anna was ______ percent. (A) –5 (B) 3.7 (C) 5 (D) 9