Problem: The activity of a radioisotope is 3000 counts per minute at one time and 2736 counts per minute 48 hours later. What is the half-life of the radioisotope? (A) 831 hr (B) 521 hr (C) 361 hr (D) 1.44 hr

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The activity of a radioisotope is 3000 counts per minute at one time and 2736 counts per minute 48 hours later. What is the half-life of the radioisotope?

(A) 831 hr

(B) 521 hr

(C) 361 hr

(D) 1.44 hr

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