An initial sample of 199 g of a radioactive substance decays according to the function A(t) = 199e-0.026t where t is given in years. (a) How many grams of the substance will remain after 143 years? Round your answer to one decimal place. (b) What is the half-life of the substance? Round your answer to one decimal place.
An initial sample of 199 g of a radioactive substance decays according to the function A(t) = 199e-0.026t where t is given in years. (a) How many grams of the substance will remain after 143 years? Round your answer to one decimal place. (b) What is the half-life of the substance? Round your answer to one decimal place.
Chapter5: Exponential And Logarithmic Functions
Section: Chapter Questions
Problem 28T: The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of...
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