[" A sample of radioactive material "A" ,that has an activity of "mCi(1Ci=3.7times10^(10)" decays "1],[" has twice the number of nuclei as another sample of a different radioactive materia "],[" which has an activity of "20mC" i.The correct choices for hall-lives of "A" and "B" would "]

A sample of radioactive material A, that has an activity of 10 mCi(1 Ci=3.7xx10^(10)decays//s) , has twice the number of nuclei as another sample of a different radioactive material B which has an activity of 20 mCi. The correct choices for half-lives of A and B would then be respectively :

A sample of radioactive material A, that has an activity of 10 mCi(1 Ci=3.7xx10^(10)decays//s) , has twice the number of nuclei as another sample of a different radioactive material B which has an activity of 20 mCi. The correct choices for half-lives of A and B would then be respectively :

A radioactive sample S_1 having an activity of 5muCi has twice the number of nuclei as another sample S_2 which has an activity of 10muCi . The half-lives of S_1 and S_2 can be

A radioactive sample S_1 having an activity of 5muCi has twice the number of nuclei as another sample S_2 which has an activity of 10muCi . The half-lives of S_1 and S_2 can be

A radioactive sample S_1 having an activity of 5muCi has twice the number of nuclei as another sample S_2 which has an activity of 10muCi . The half-lives of S_1 and S_2 can be

A radioactive sample S_(1) having an acitivity of 5 mu Ci has twice the number of nuclei as another sample S_(2) which has a activity of 10 mu Ci . The half lives of S_(1) and S_(2) can be

A radioactive sample S_(1) having an activity 5 mu Ci has twice the number of inucle as another sample S_(2) which has as activity of 10 mu Ci . The half lives of S_(1) and S_(2) can be