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u eCampus | Adelphi University x 5 Launch Meeting - Zoom | in Homework #5 - Cold War Tech x A MTH 110 HW #5 - Chapter 3 Sex + webassign.net/web/Student/Assignment-Responses/submit?dep=27672355&tags=autosave#question5098459_7 Top # Update : 4. [-/1 Points] DETAILS TANAPMATH7 3.3.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Radioactive Decay The radioactive element polonium decays according to the law given below where Q is the initial amount and the time t is measured in days. Q(t) = 20 . 2-(t/140) If the amount of polonium left after 280 days is 55 mg, what was the initial amount present? mg Need Help? Read It 5. [-/3 Points] DETAILS TANAPMATH7 3.3.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Radioactive Decay Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.) Q (t) = I What amount (in grams) will be left after 11.1 days? (Round your answer to three decimal places.) How fast (in grams per day ) is the P-32 decaying when t = 11.1? ( Round your answer to three decimal places.) 9/day Need Help? Read It Watch It MY NOTES ASK YOUR TEACHER PRACTICE ANOTHE