1. Applying the compound interest formula, A= P(1+r/n)nt A= $400(1+0.043/12)12x12 Or, A= $669.51 2. Data for question is insufficient. Explain abbreviation CF Solution 1. Applying the compound interest formula, A= P(1+r/n)nt A= $400(1+0.043/12)12x12 Or, A= $669.51 2. Data for question is insufficient. Explain abbreviation CF.