Algebra.Com's Answer #846990 by ikleyn(52781)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( "With each stroke, a pump removes 2/5 of the air in a container. After 3 strokes what is the fraction of the original amount
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document.write( "of air in the container that is left?
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document.write( "Let M be the initial mass of the air in the container.\r\n" );
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document.write( "After first stroke, the remaining mass of the air in the container is  =  .\r\n" );
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document.write( "Thus we see that the coefficient from the current air mass to remaining mass\r\n" );
document.write( "after the first stroke is 3/5.\r\n" );
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document.write( " | This coefficient remains the same at every stroke. |\r\n" );
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document.write( "After second stroke, the remaining mass of the air in the container is  =  .\r\n" );
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document.write( "After third stroke, the remaining mass of the air in the container is  =  =  .\r\n" );
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document.write( "ANSWER. After third stroke, the remaining mass of the air in the container is .\r\n" );
document.write( " The remaining fraction of the original mass is  .\r\n" );
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document.write( "Solved.\r
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