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Strontium-90 is a radioactive material that decays according to the function A(t) = Ao e ', where A, 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.)

Strontium-90 is a radioactive material that decays according to the function A(t) = Ao e ', where A, 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.)

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section: Chapter Questions
Problem 18T
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Strontium-90 is a radioactive material that decays according to the function A(t) = A, e -U.02441, where A, 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.)
Transcribed Image Text:Strontium-90 is a radioactive material that decays according to the function A(t) = A, e -U.02441, where A, 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.)
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