document.write( "Question 306840: Plants, which get their carbon dioxide from the air, contain small amounts of carbon-14. Once a plant is cut it no longer forms Carbon-14 and in fact the amount present starts to decay. The half life for Carbon-14 is 5730 years. If a plant had 30 units of Carbon-14 in it when it was cut, find an equation that models the decay of Carbon-14 in this plant. \n" ); document.write( "

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Plants, which get their carbon dioxide from the air, contain small amounts of carbon-14.
\n" ); document.write( " Once a plant is cut it no longer forms Carbon-14 and in fact the amount present starts to decay.
\n" ); document.write( " The half life for Carbon-14 is 5730 years.
\n" ); document.write( "If a plant had 30 units of Carbon-14 in it when it was cut, find an equation
\n" ); document.write( " that models the decay of Carbon-14 in this plant.
\n" ); document.write( ":
\n" ); document.write( "The half-life equation
\n" ); document.write( "A = Ao*2^(-t/h)
\n" ); document.write( "Where
\n" ); document.write( "A = resulting amt after t years
\n" ); document.write( "Ao = initial amt
\n" ); document.write( "t = time in yrs
\n" ); document.write( "h = half-life of the substance
\n" ); document.write( ":
\n" ); document.write( "A = 30*2^(-t/5730) \n" ); document.write( "

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