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Today, 16:32

You have 32 grams of a radioactive kind of gold. If its half-life is 3 days, how much will be left after 6 days?

a. 5 grams

b. 4 grams

c. 16 grams

d. 8 grams

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Answers (2)
  1. Today, 17:01
    0
    d. 8 grams.

    Step-by-step explanation:

    After 1 half life there is 1/2 * 32 = 16 grams left, after another half-life (at 6 days) there is 1/2 * 16 = 8 grams left.
  2. Today, 19:08
    0
    D. 8 grams

    The equation

    Ending Amount = Beginning Amount / 2 (time / half-life)

    32/2^ (6/3)

    32/2^2

    32/4

    =8
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