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14 June, 02:42

H = - 4.9t + 27t + 2.4 (h is in meters)

For how long is the balloon more than 3m high?

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Answers (2)
  1. 14 June, 04:37
    0
    -4.9t + 27t = 22.1t A=22.1t + 2.4 (you cant add it any farther because they dont have a varible in common)
  2. 14 June, 06:23
    0
    Plug in 3 for the height:

    3 = - 4.9t + 27t + 2.4

    Combine like terms:

    3 = 22.1t + 2.4

    Subtract 2.4 to both sides:

    0.06 = 22.1t

    Divide 22.1 to both sides:

    t =.00271493213
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