Scientists discovered a new radioactive element K, whose half-life is 20,000 years.

The quantity of K present after t years is K(t)=6(1/3)^{t/}^{20}^{,}^{0}^{00}.

(1) What is the initial quantity of K? (round to the nearest whole gram)

(2) What is the quantity of K present after 10,000 years? (round to the nearest tenth of a gram)