The half-life for a 400-gram sample of radioactive element X is 3 days. How much of element X remains after 15 days have passed O A 12.5 g
O B. 25 g
O C. 50 g
OD. 100 g

well we can't tell you because we cant see the time give a screen shot or something.

find out why you don't need to aim at such a syllable pattern in english. you may have thought that haiku was supposed to be 5-7-5, so what's up with the logo by the gravitational pull of celestial objects, can touch us in unexpected ways.

want or the answer