The following data indicate the scores of some students in a competition:
30 points
11 points
14 points
23 points
21 points
31 points
32 points

The half-life of a certain material is 0.002 second. approximately how much of a 14-gram sample will be left after 0.004 second? a. 12 grams b. 3.5 grams c. 0.06 gram d. 7 grams