document.write( "Question 1159187: At the beginning of an experiment, a scientist has 140 grams of radioactive goo. After 60 minutes, her sample has decayed to 2.1875 grams.\r
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\n" ); document.write( "Find a formula for G(t), the amount of goo remaining at time t. G(t)=
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\n" ); document.write( "How many grams of goo will remain after 53 minutes? \n" ); document.write( "

Algebra.Com's Answer #782265 by ikleyn(52794) $\"\"$ $\"About$

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document.write( "Notice that   = 64 = .\r\n" );
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document.write( "It means that 60 minutes comprise 6 half-life periods.\r\n" );
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document.write( "Thus one half-life period is    = 10 minutes.\r\n" );
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document.write( "Therefore, the formula for G(t)  is  G(t) = ,  where t is in minutes from the starting moment.\r\n" );
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document.write( "To answer the last question, substitute t= 53 into the formula\r\n" );
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document.write( "    G(53) =  = 3.553604 grams.\r\n" );
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