Multiple Choice
The half-life for beta decay of strontium-90 is 28.8 years.A milk sample is found to contain 10.3 ppm strontium-90.How many years would pass before the strontium-90 concentration would drop to 1.0 ppm?
A) 92.3
B) 0.112
C) 186
D) 96.9
E) 131
Correct Answer:

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Correct Answer:
Verified
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