Quadratic functions

Question

A survival kit is dropped from a helicopter. The height, h in metres , of the kit above the ground t seconds after it is released is modelled by the quadratic function h(t)=235-4.9t²

How high is the survival kit above the ground after 5s?

Answer 1

You have the function given. You have to plug in t=5 s in the equation:

 

So the height will be:

 

h(t=5) = 235 - 4.9*5² = 112.5 m