We are told the half-life is 6 years, so we may state:
and so:
The percentage remaining after time is then:
Hence:
a)
b)
c)
How would you go about solving this? (it's question 13 in the image)
The decay of uranium is modelled by D=D₀ x 2^-kt. If it takes 6 years for the mass of uranium to half, find the percentage remaining after
a) 2 years
b) 5 years
c) 10 years
The answers are a) 79%, b) 56% and c) 31%