Question

a rocket is launched in the air. the graph below shows the height of the rocket h in feet after t seconds. how many seconds have gone by when the rocket is at its highest point?

Explanation:

Step1: Identify highest - point coordinates

The highest point of the rocket's height - time graph is given as the point $(18,5184)$. The first value in the coordinate pair represents time $t$ and the second represents height $h$.

Answer:

18