Question

A model rocket is launched from

the top of an observation tower
that is 75 feet high. The height
of the rocket, h(t), is
determined by the function
h(t)--16r2 + 48t +75 where t is
the number of seconds elapsed
since the rocket was launched.
When does the rocket land on
the ground? Round to the
nearest hundredth.

Answer 1

>>> t = 3/2 - sqrt(111)/4

>>> t = 3/2 + sqrt(111)/4

Explanation:

-16r^2 + 48t +75=0

>>> t = 3/2 - sqrt(111)/4

>>> t = 3/2 + sqrt(111)/4