A = Ao * (1/2)^(n/22)
.8 = .5^(n/22)
log .8 = (n/22) log .5
n/22 = .3219
n =7.08 years
The half-life of lead is 22 years. How long will it take for a sample of this substance to
decay to 80% of its original amount
1 answer
1 answer