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###### Part A - The activity of a certain isotope dropped from 3200 Ci to 800 Ci...

Part A - The activity of a certain isotope dropped from 3200 Ci to 800 Ci in 4.0 years. What is the half-life of this isotope (in years)? Essay answers are limited to about 500 words (3800 characters maximum, including spaces). 3800 Character(s) remaining Submit Request Answer Part B - How many half lives have elasped in a sample with a half life of 3 hours after 24 hours? Calculate the number of half lives that elapse after 24 hours if a sample has a half life of 3 hours. Essay answers are limited to about 500 words (3800 characters maximum, including spaces). 3800 Character(s) remaining

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