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kbutto
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can help me with this question :S?
If 70% of a radioactive substance remains after one year, find its half-life.
and
Strontium-90 is a radioactive isotope with a half-life of 29 years. If you begin with a sample of 800 units, how long will it take for the amount of radioactivity of the strontium sample to be reduced to
(a) 400 units
(b) 200 units
(c) 1 unit
*it has to do wit exponential growth and decay and maybe... with differential equations
If 70% of a radioactive substance remains after one year, find its half-life.
and
Strontium-90 is a radioactive isotope with a half-life of 29 years. If you begin with a sample of 800 units, how long will it take for the amount of radioactivity of the strontium sample to be reduced to
(a) 400 units
(b) 200 units
(c) 1 unit
*it has to do wit exponential growth and decay and maybe... with differential equations