Vans123
Vans123 發問於 科學及數學數學 · 4 年前

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

Attachment image

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

還有問題嗎？立即提問即可得到解答。