The half-life of cesium-137 is 30 years. Suppose we have a 160-mg sample.(a) Find the mass that remains after t years.y(t) = Correct: Your answer is correct. mg(b) How much of the sample remains after 80 years? (Round your answer to two decimal places.) Incorrect: Your answer is incorrect. mg(c) What is the rate of decay after 200 years? (Round your answer to three decimal places.) Correct: Your answer is correct. mg/yr(d) After how long will only 1 mg remain? (Round your answer to one decimal place.)t = Incorrect: Your answer is incorrect. yr
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