Have a test next week, pls help or guide me to solve this math problem which involve calculus! (full solutions will be appreciated)?

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1 個解答

評分
  • Lopez
    Lv 5
    4 年前
    最愛解答

    ( 1 - 87.5% ) * Io = Io * (1/2)^(t/8)

    0.125 = (1/2)^(t/8)

    (1/2)^3 = (1/2)^(t/8)

    t / 8 = 3

    t = 24

    Ans: 24 days

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