The half life of the radio active substance is the time require the half the substance to decay. the mount A ( in grams) of 100 gram sample of a radio active substance remaining after t half lives by A equals to 100 (0.5) t. suppose the substance has a half life of 10 days. explain how to find the amount left after 40 days. than find the amount..

1 answer

No
100 (0.5)^t
It is to the power of number of periods like compound interest
40 days is 4 half lives
so
100 (0.5)^4
= 100/16
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