document.write( "Question 657390: Hi,\r
\n" ); document.write( "\n" ); document.write( "I am so stuck on half lives of Radioactive isotope in science. I thought I had the correct answer to these questions, but they are not. Please help me.\r
\n" ); document.write( "\n" ); document.write( "I need to know if you have 2 grams of Carbon-14, after 5760 years there would be how many grams left?\r
\n" ); document.write( "\n" ); document.write( "If you how 2 grams of Carbon-14, after 11520 years there would be how many grams left?\r
\n" ); document.write( "\n" ); document.write( "If you have 2 grams of Carbon-14, after 23040 years there would be how many grams left?\r
\n" ); document.write( "\n" ); document.write( "Please break this down to me. I am SO comfused. Thanks
\n" ); document.write( "

Algebra.Com's Answer #409861 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
\n" ); document.write( "\"Q%28t%29+=+Q%5B0%5De%5E%28-kt%29\" where k = .00012 (assume this is the k You are using)
\n" ); document.write( "\"Q%28t%29+=+2e%5E%28-.00012t%29\"
\n" ); document.write( "\"Q%285760%29+=+2e%5E%28-.00012%2A5760%29=+1.0019g\"
\n" ); document.write( "\"Q%2811520%29+=+2e%5E%28-.00012%2A11520%29=+.502g\"
\n" ); document.write( "\"Q%2823040%29+=+2e%5E%28-.00012%2A23040%29=+.126g\" \n" ); document.write( "
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