An initial sample of 143 g of a radioactive substance decays according to the function A(t)=143e−0.019^t where t is given in years. (a) How many grams of the substance will remain after 60 years? Round your answer to one decimal place. (b) What is the half-life of the substance? Round your answer to one decimal place.
Unitary Method
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An initial sample of 143 g of a radioactive substance decays according to the function A(t)=143e−0.019^t where t is given in years.
(a) How many grams of the substance will remain after 60 years? Round your answer to one decimal place.
(b) What is the half-life of the substance? Round your answer to one decimal place.
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