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13 September, 05:44

A diver dives from a 10 m springboard. The equation

f (t) = -4.9t2+4t+10

models her height above the pool at time t in seconds. At what time does she enter the water?

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Answers (1)
  1. 13 September, 05:51
    0
    0.8163265306

    Step-by-step explanation

    here f (t) is distance which is 10m.

    so

    10 = - 4.9t²+4t+10

    then solve this

    -4.9t²+4t=0

    -4.9t+4=0

    4.9t=4

    t=4:4.9

    time is 0.8163265306 seconds
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