Question

A hovercraft takes off from a platform.

Answer 1

Answer:

81 meters.

Step-by-step explanation:

The height (in meters), h(x) of a hovercraft x seconds after takeoff, is modeled by:

$h(x)=-3(x-3)^2+108$

We are to determine its height at the time of takeoff.

Now, at the time of takeoff, x=0.

We substitute x=0 to solve for h.

$h(0)=-3(0-3)^2+108\\=-3(-3)^2+108\\=-3(9)+108\\=-27+108\\=81 meters$

The height of the hovercraft at takeoff is 81 meters.

Answer 2

Answer:

33

Step-by-step explanation:

KHAN SAYS SO