document.write( "Question 449335: the half life of strontium-90 is approximately 28 years. write a formula,p(t), that models the percent of strontium-90 after t years. (hint: we are starting with 100%). i am not sure what formula to use or how to set it up. i am thinking it might be the expenential function but not sure how to set it up? \n" ); document.write( "

Algebra.Com's Answer #309142 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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the half life of strontium-90 is approximately 28 years.
\n" ); document.write( " write a formula,p(t), that models the percent of strontium-90 after t years.
\n" ); document.write( ":
\n" ); document.write( "The radioactive decay formula
\n" ); document.write( "A = Ao*2^(-t/h)
\n" ); document.write( "Where
\n" ); document.write( "A = resulting amt after t time
\n" ); document.write( "Ao - initial amt
\n" ); document.write( "h = half-life of substance
\n" ); document.write( "t = time of decay
\n" ); document.write( ":
\n" ); document.write( "To find percent here, you could write it
\n" ); document.write( "p(t) = 100*2^(-t/28) \n" ); document.write( "

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