The activity fo a radioactive sample decrases t `1//3` of the orginal acticity. `A_(0)` in a period of `9` year. After `9` year more, its activity will be:

The activity of a radioactive sample decreases to 1//3 of the original activity, A_(0) in a period of 9 years. After 9 years more, its activity A_(0)//x . Find the value of x .

The activity of a radioactive sample decreases to one tenth of the original activity A_(0) in a period of one year further After further 9 years, its activity will be :

The activity of a radioactive element decreases to one third of the original activity I_(0) in a period of nine years. After a further lapse of nine years, its activity will be

The activity of a radioative element decreases to one third of the original activity I_(0) in a period of nine years. After a further 1apse of nine years, its activity will be

The activity of a radioative element decreases to one third of the original activity I_(0) in a period of nine years. After a further 1apse of nine years, its activity will be