SOLUTION: Radioactive iodine is used to determine the health of the thyroid gland it decays according to the equation y=ae*-0.0856t where t is in days find the half life of this substance

Question 182244This question is from textbook
: Radioactive iodine is used to determine the health of the thyroid gland it decays according to the equation y=ae*-0.0856t where t is in days find the half life of this substance
i dont understand all you are given is the exponent of -0.0856 This question is from textbook

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
At time t=0, you have "a" units of iodine since

Half life is the time it takes to reach 1/2 of your original amount.
Since you started with "a" units, how long will it take to get to "a/2" units?

or approximately

It takes 8.1 time units to get to 1/2 of the original amount of iodine.
The time unit is dependent on how 0.0856 is originally defined.

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