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A hovercraft takes off from a platform.
Its height (in meters), x seconds after takeoff, is modeled by
h(x) = -(x – 11)(x + 3)
How many seconds after takeoff will the hovercraft land on the ground?
___________ seconds

Respuesta :

sqdancefan

Answer:

  11 seconds

Step-by-step explanation:

The value of h(x) is zero when either of the factors is zero:

  x -11 = 0   ⇒   x = 11

  x +3 = 0   ⇒   x = -3

The solution x = -3 is not in the practical domain of the model, so the only reasonable solution is x = 11.

The hovercraft will land 11 seconds after takeoff.

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