NASA launches a rocket at
t
=
0
t
=
0
seconds. Its height, in meters above sea-level, in terms of time is given by
h
=
−
4.9
t
2
+
259
t
+
423
h
=
-
4.9
t
2
+
259
t
+
423
.

How high is the rocket after 8 seconds?

meters

How high was the rocket when it was initially launched?

meters