Question

the graph below shows the altitude, in feet, of a model rocket t seconds after launch. during this time, the rocket experiences three distinct modes of flight. initially, the engine accelerates the rocket upward. the rocket then coasts upward, is slowed by gravity, and eventually begins to fall. last, a parachute opens and the rocket drifts smoothly back to the ground. when was the model rocket 600 feet above the ground? 4.5 seconds 7 seconds 7 and 9.5 seconds 4.5 and 12 seconds

Explanation:

Step1: Analyze the graph

We need to find the time - values when the altitude (y - value) of the rocket is 600 feet.

Step2: Locate 600 on the altitude axis

Find the points on the graph where the altitude is 600 feet and then read the corresponding time - values on the time axis.

Step3: Identify the time - values

By looking at the graph, we can see that the rocket is at 600 feet at approximately 4.5 seconds on the way up and 12 seconds on the way down.

Answer:

D. 4.5 and 12 seconds