In 5.49 seconds, 1.2 grams of Argon-35 decay to leave only 0.15 grams. What is the half-life of Argon-35 A- 21.96 seconds
B- 16.47 seconds
C- 1.83 seconds
D- 1.3725 seconds

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

can you list the answers so i can answer