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| rev | Admin | (Created page with "'''Solution: B''' <math display="block"> \begin{aligned} R_1= & \frac{20000}{\frac{1-\left(\frac{1.1}{1.09}\right)^{10}}{0.09-0.1}}=\frac{20000}{9.562} \\ = & 2091.61 \end{aligned} </math> The fourth payment is <math>2091.61(1.1)=2300.71</math> The principal outstanding before the fourth payment is <math display="block"> 2300.71 \frac{1-\left(\frac{1.1}{1.09}\right)^9}{0.09-0.1}=19708.94 </math> Interest in the fourth payment is <math>=19708.94(0.09)=1773.80</mat...") | Nov 19'23 at 15:03 | +573 |