The activity of a radioactive element decreases in 10 years to 1/5 of initial activity `A_(0)`. After further next 10 years, its activity will be

The activity of radioactive isotope decreases with:

Activity of radioactive element decreased to one third of original activity R_0 in 9 years. After further 9 years, its activity will be

Activity of radioactive element decreased to one third of original activity R_0 in 9 years. After further 9 years, its activity will be

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 .

Activity of a radioactive sample reduces to (1//4)th of its original activity A_0 in 32 years. After another 12 years activity would become