Problem 403. Einsteinium-253 decay
Radioactive Einsteinium-253 has a half-life of 1,768,608 seconds. Given 1000mg of Einsteinium-253 at t=0 days, how much is left after 50 days?
EX: >> decay(50)
HINT: find k, then decay(50)
NB: make sure you round your answer up to the next highest integer.
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