Question

strontium 90 is aradioactive material that decays according to the function a(t)=aoe^-0.0244t where a0 is the initial amount present and a is the amount present at time t( in years) Assume that a scientist has a sample of 400 grams of srontium 90.
how much strontium 90 is left after 30 years?
when will only 300 grams of strontium 90 be left?
what if the half life of stroitum 90?

Answer 1

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