# SOLUTION: Still lost, please help!! Lead pipes and solder are often found in older buildngs. Unfortunately, as lead decays, toxic chemicals can get in the water resting in the pipes. The

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Evaluation -> SOLUTION: Still lost, please help!! Lead pipes and solder are often found in older buildngs. Unfortunately, as lead decays, toxic chemicals can get in the water resting in the pipes. The       Log On

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 Click here to see ALL problems on Evaluation Word Problems Question 458255: Still lost, please help!! Lead pipes and solder are often found in older buildngs. Unfortunately, as lead decays, toxic chemicals can get in the water resting in the pipes. The half-life of lead is 22 yr. What is the decay rate? ThamksAnswer by stanbon(57347)   (Show Source): You can put this solution on YOUR website!The half-life of lead is 22 yr. What is the decay rate? ---------- Let "r" be the remainder rate : ---------- Solve: (1/2)Ao = Ao(r)^22) --- r^22 = (1/2) r = 0.5^(1/22) r = 0.97 Decay rate = 1-0.97 = 3% ============================= Cheers, Stan H.