apexjer1co apexjer1co Today at 10:55 PM Mathematics Answered HURRY!!! A radioactive isotope has a half-life of 9 hours. Find the amount of the isotope left from a 360-milligram sample after 36 hours. If necessary, round your answer to the nearest thousandth. A.45 mg b.22.5 mg c.10 mg d.0.703 mg