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 2 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) 1.388 days
B) 1.851 days
C) 2.777 days
D) 0.463 days
E) 0.926 days