You Are Trying to Determine the Half-Life of a New

Multiple Choice

You are trying to determine the half-life of a new radioactive element you have isolated. You start with 3 grams, and 4 days later you determine that it has decayed down to 0.1 gram. What is the half-life? Round your answer to three decimal places. Select the answer rounded to three decimal places.

A) 0.815 days
B) 1.630 days
C) 0.408 days
D) 2.446 days
E) 1.223 days