Physics, 21.09.2019 18:10, glocurlsprinces

Acontaminated rag has been decaying for 48 hours and its activity measured to be 10.72% of its original activity. what it the half-life isotope?
a- 0.04652 hrsb- 48 hrsc- 24.09 hrsd- 14.9 hrs

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Acontaminated rag has been decaying for 48 hours and its activity measured to be 10.72% of its origi...