Choose the one alternative that best completes the statement or answers the question.
-The half-life of plutonium-234 is 9 hours. If 60 milligrams is present now, how much will be present in 3 days? (Round your answer to three decimal places.)
A) 47.622
B) 0.234
C) 5.952
D) 34.461

Question

Quizplus · Accepted Answer

The half-life formula is used to calculate the remaining amount of a substance after a certain time period. Given the half-life of plutonium-234 is 9 hours and we want to find the amount remaining after 3 days (72 hours), we use the formula: remaining amount = initial amount * (1/2)^(time/half-life). Substituting the given values: 60 * (1/2)^(72/9) = 60 * (1/2)^8 = 60 * (1/256) ≈ 0.234 milligrams.

Choose the One Alternative That Best Completes the Statement or Answers