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

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? Thamks
Answer by stanbon(75887) (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.

RELATED QUESTIONS
A certain automatic soldering machine requires a solder containing half tin and half... (answered by josmiceli)

how many pounds of 60-40 solder (60% tin, 40% lead) must be mixed with 40-60 solder to... (answered by ikleyn)

A ball of lead 4 cm in diameter is covered with gold .If the volume of the gold and lead (answered by josgarithmetic)

Please help me to find the solution and answer in linear equation. How much tin and how... (answered by oberobic)

To paint the gym for homecoming, Senate needs 25 gallons of lead pait and has $141... (answered by stanbon)

Using 1 lb. of lead, and allowing 5% for waste, determine amount of shot 1/16 in. in... (answered by Alan3354)

Using 1 lb. of lead, and allowing 5% for waste, determine amount of shot 1/16 in. in... (answered by CPhill)

Determine number of lead balls, 1/4 in. in diameter, are in 1 lb. Lead weighs .41 lbs. (answered by Alan3354,josmiceli,ikleyn)

An alloy contains 20% silver and 30% lead. How much silver and how much lead should be... (answered by josgarithmetic)