Correct Answer: Option C

Explanation

116 days = 4 half - lives
Thus, after 4 half lives the fraction left of any radioactive materials is given by (¹/₂)⁴ = ¹/₁₆
∴ Count rate / amount left = ¹/₁₆ x ⁸⁰⁰/₁
= 50 count / min

• professor John is the leader of the ________ committee to review the new book? Answer this

  1 Answers   ·   English Language   ·   3 months ago
• His contract was ---- because of irregularities in his contract You picked annulled over terminated and I want to know... Answer this

  1 Answers   ·   English Language   ·   2 months ago
• whats is the difference between phrase and clause? Answer this

  2 Answers   ·   English Language   ·   3 days ago