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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/20,000.

(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)