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Half life (intermediate)

Problem

The 106th element, seaborgium, was created artificially in 1974 by bombarding heavy nuclei with lighter ones at the HILAC collider (shown below).
Say, an unknown amount of seaborgium nuclides is produced at time, t, equals, 0, point, 0, space, start text, s, end text.
The instruments detect 32, space, start text, m, o, l, e, s, end text at t, equals, 2, point, 0, space, start text, s, end text, which reduces to only 2, point, 0, space, start text, m, o, l, e, s, end text at t, equals, 6, point, 0, space, start text, s, end text.
How many start text, m, o, l, e, s, end text of seaborgium nuclides were present initially at t, equals, 0, point, 0, space, start text, s, end text?
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