Question
Strontium 90 is a radioactive material that decays according to the function Upper A left parenthesis t right parenthesis equals Upper A 0 e Superscript
Strontium 90 is a radioactive material that decays according to the function Upper A left parenthesis t right parenthesis equals Upper A 0 e Superscript negative 0.0244 t Baseline comma
A(t)=A0e0.0244t, where Upper A 0
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 800
800 grams of strontium 90.
(a) What is the decay rate of strontium90?
(b) How much strontium 90 is left after 10
10 years?
(c) When will only 600
600 grams of strontium 90 beleft?
(d) What is thehalf-life of strontium90?
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