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Strontium-90 is a radioactive material that decays according to the function A(t) = Ao 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 800 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40 years? (c) When will only 200 grams of strontium-90 be left? (d) What is the half-life of strontium-90? CHI (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 is left after 40 years. (Do not round until the final answer. Then round to the nearest whole number as needed)

Strontium-90 is a radioactive material that decays according to the function A(t) = Ao 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 800 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40 years? (c) When will only 200 grams of strontium-90 be left? (d) What is the half-life of strontium-90? CHI (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 is left after 40 years. (Do not round until the final answer. Then round to the nearest whole number as needed)

Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Strontium-90 is a radioactive material that decays according to the function A(t) = Ao 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 800 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40 years? (c) When will only 200 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 is left after 40 years. (Do not round until the final answer. Then round to the nearest whole number as needed.). (c) Only 200 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.) (d) The half-life of strontium-90 is approximately years. (Do not round until the final answer. Then round to the nearest tenth as needed.)
Transcribed Image Text:Strontium-90 is a radioactive material that decays according to the function A(t) = Ao 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 800 grams of strontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40 years? (c) When will only 200 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 is left after 40 years. (Do not round until the final answer. Then round to the nearest whole number as needed.). (c) Only 200 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.) (d) The half-life of strontium-90 is approximately years. (Do not round until the final answer. Then round to the nearest tenth as needed.)
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