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Discover Questions

Radium-223 decays with a half-life of 11.4 days. Part A
How long will it take for a 0.240-mol sample of radium to decay to 3.75×10−3mol? Mrs. W has grades of 79, 96, 88, 74, and 95 on her tests. What grade should mrs. W get for her 6th test, if she wants an average of 90? Sinθ =1/4. tan θ >0 find cos θ/2? 1g of ice at -4 degrees Q? Vapor at 110 degrees.? What are the elements of order 5 in z130 and the elements of order 5 in d65 where d is the dihedral group?