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The half life of an atom is 30 years. Suppose we have a sample which weights 170g. Find the function w() which gives the mass

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The half life of an atom is 30 years. Suppose we have a sample which weights 170g. Find the function w() which gives the mass remaining after / years, and enter into w. How much of the sample remains after 140 years, enter it into w_140., rounded to 2 decimal places. After how many years will only 1g remain, enter it as t_1, rounded to 1 decimal place

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