document.write( "Question 697719: Find r (common ratio) if a2= 6 and a5= 0.048. I've tried finding r and setting them equal to each other but I have not found a good answer yet. \n" ); document.write( "
Algebra.Com's Answer #430243 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
a2= 6 and a5= 0.048
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document.write( "Use the formula:\r\n" );
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document.write( "an = a1r(n-1)\r\n" );
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document.write( "First with n=2\r\n" );
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document.write( "a2 = a1r(2-1)\r\n" );
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document.write( "6 = a1r1\r\n" );
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document.write( "6 = a1r\r\n" );
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document.write( "\"6%2Fr\" = a1\r\n" );
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document.write( "And then with n=5\r\n" );
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document.write( "a5 = a1r(5-1)\r\n" );
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document.write( "0.048 = a1r4\r\n" );
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document.write( "\"0.048%2Fr%5E4\" = a1\r\n" );
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document.write( "Equating the expressions for a1\r\n" );
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document.write( "\"6%2Fr\" = \"0.048%2Fr%5E4\"\r\n" );
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document.write( "Cross multiplying\r\n" );
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document.write( "6r4 = 0.048r\r\n" );
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document.write( "Divide both side by 6r\r\n" );
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document.write( "r³ = \"0.048%2F6\"\r\n" );
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document.write( "r³ = 0.008\r\n" );
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document.write( "Taking cube roots of both sides\r\n" );
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document.write( " r = \"root%283%2C0.008%29\"\r\n" );
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document.write( " r = 0.2\r\n" );
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document.write( "Edwin
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