Question

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Answer 1

Explanation:

Mass after 50 days = ?

Beginning mass

mass 1/2 life = 64.9

Mass after 50 days = beginning mass (1/2)^(t/64.9)

Mass after 50 days = 10 * 1/2 ^ (50 / 64.9)

Mass after 50 days = 10 * 0.586

Mass after 50 days = 5.86 mg