9. Use the given quadratic function to answer questions about the situation it models. (3 points total) The function h = -4.9t2 +50t +30 models the heighth (in meters) of the rocket t seconds after its launch.
(a) Graph the height versus time for the rocket, on the coordinate plane to the right. You should use Desmos
or a graphing calculator to help you.
180
160
140
(b) Determine and label the height of the rocket at its vertex
maximum
120
100
80
60
Determine and label the coordinate that shows how many
seconds it will take before the rocket hits the ground
40
20
0
2 4 6 8 10 12