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: Locate 600 - feet on y - axis

Find the 600 - feet mark on the altitude axis.

Step2: Draw horizontal line

Draw a horizontal line at y = 600 across the graph.

Step3: Find intersection points

Find the points where the horizontal line intersects the rocket - altitude curve.

Step4: Read x - values

Read the corresponding x - values (time values) at the intersection points. From the graph, these values are approximately 4.5 seconds and 12 seconds.

Answer:

D. 4.5 and 12 seconds