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mybingbinghk

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of radioactive material to decay to one-half of its original amount.

i) The half-life of Carbon 14 (C-14) is 5230 years. Determine the decay-rate

parameter for C − 14.

ii)The half-life of Iodine 131 (I-131) is 8 days. Determine the decay-rate param-

eter for I − 131.

## Homework Equations

dx/dt = -bx where b is a constant

## The Attempt at a Solution

i) let x(t) be the quantity of radionactuve meterial at time t in year and dx/dt be the rate of change of the quantity.

dx/dt = -bx where b is a constant

I dun no how to process after doing this assumption. Please help to give some hints on doing these questions. Many thanks!