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Strontium-90 is a radioactive material that decays according to the function A(t) = A e...

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Strontium-90 is a radioactive material that decays according to the function A(t) = A e ^-0.0244t, where Ao 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 strontium-90.(a) What is the decay rate of strontium-90?(b) How much strontium-90 is left after 10 years?(c) When will only 100 grams of strontium-90 be left?(d) What is the half-life of strontium-90?(a) The decay rate of strontium-90 is (Type an integer or a decimal. Include the negative sign for the decay rate.)(b) Approximately ___grams of strontium-90 left after 10 years.(Do not round until the final answer. Then round to the nearest whole number as needed.)(c) Only 100 grams of strontium-90 will be left in about ____years.(Do not round until the final answer. Then round to the nearest tenth as needed.)

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