document.write( "Question 1029187: Using algebraic progression:
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document.write( "Hanh deposited $200 into the bank on 1 January and on the first day of each of the following months. At the end of June, when the interest was calculated, he found that his account balance was $1206.30. Find the rate of simple interest paid by the bank. \n" );
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Algebra.Com's Answer #644279 by stanbon(75887) ![]() You can put this solution on YOUR website! Hanh deposited $200 into the bank on 1 January and on the first day of each of the following months. At the end of June, when the interest was calculated, he found that his account balance was $1206.30. Find the rate of simple interest paid by the bank. \n" ); document.write( "---------------------- \n" ); document.write( "Jan1:: 200 \n" ); document.write( "Feb1:: 2(200)+200(r) = 200(2+r) \n" ); document.write( "Mar1:: 3(200) + [200(2+r)]r = 200(3+(2+r)r = 200(3+2r+r^2) \n" ); document.write( "etc. till you get to 1Julyl. \n" ); document.write( "Then set the 1Jul result equal to 1206.30 and solve for \"r\":: \n" ); document.write( "------ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------------ \n" ); document.write( " \n" ); document.write( " |