MHF X Assignments - X U3A7 Assignn X _ Activity 7: App X | E U3A7: Unit 3 x | Blank Docume x C Chegg Search X arningontario.ca/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d21?ou=19272558&isprv=&drc=1&qi=5899566&cfql=0&dnb=0&fromQE chure Creator Become a Financi Assignments - SC... Untitled document 5: Biotechnol G ExploreLearning G... B Content ctivity 8: Unit Test 0:00 Time Taken: 1:25:22 Kristina Doney: Attempt 1 Previous Page Next Page Page 9 of 10 9. During the transportation of thorium-243 to a nuclear waste facility, a spill occurred near Springfield. The town was evacuated. None of the town's residents would be allowed to return home until the thorium-243 isotope decayed to one- quarter of its original radioactivity. The half-life of thorium-243 is 24 days. a) Determine a model (equation) for this situation. b) For how long was Springfield evacuated? Previous Page Next Page Page 9 of 10 Submit Quiz O of O questions saved MacBook Pro