quarlesme0220 quarlesme0220 25-03-2020 Physics contestada A researcher measures 200 counts per minute coming from a radioactive source at noon. At 3:00pm, she finds that this has dropped to 25 counts per minute. What percentage of the original source will remain at 6:00pm? A) 3.125% B) 4.5% C) 5.8% D) 6.25%