document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1183275>Question 1183275</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If 800g of a radioactive substance are present initially and 8 years later only 450g remain, how much of the substance will be present after 16 years?   </SPAN>\n" );
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document.write( "Over the space of 8 years, the amount remaining decreases by a factor of 450/800 = 9/16.<br><BR>\n" );
document.write( "After another 8 years, the amount will again decrease by the same factor.<br><BR>\n" );
document.write( "ANSWER: (9/16)*450 = 253 1/8<br><BR>\n" );
document.write( "Since radioactive decay is a statistical process, it should be okay to round the answer to 253g.<br><BR>\n" );
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