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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.

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 73RE
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ab Question 17 An initial sample of 199 g of a radioactive substance decays according to the function A(t) = 199e 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. > Next Question (b) What is the half-life of the substance? Round your answer to one decimal place. esc ! 1 < OO Q > 2 26 W 280 a #3 E DEC 2 DE 69 t 4 R do LO % 5 tv ♫♬ NO T -0.026t MacBook Pro < C 6 & 7
Transcribed Image Text:ab Question 17 An initial sample of 199 g of a radioactive substance decays according to the function A(t) = 199e 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. > Next Question (b) What is the half-life of the substance? Round your answer to one decimal place. esc ! 1 < OO Q > 2 26 W 280 a #3 E DEC 2 DE 69 t 4 R do LO % 5 tv ♫♬ NO T -0.026t MacBook Pro < C 6 & 7
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