Meteorologists are scientists that study the many factors that influence the weather. What is the most important factor that influences the weather? F. Earth's rotation around the moon
G. O the Sun's gravitational pull
H. O energy from the winds
J. O energy from the Sun

Ibelieve it's temperature! i'm not 100% sure.

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.