Since I can't see the image you're referencing, I can guide you on how to approach solving this problem.
To determine the time when the two airplanes are at the same height, you would typically look for the point where the two lines intersect on the graph.
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Find the intersection point: Look at the graph to see where the two lines meet. The x-coordinate of this point will indicate the time when the airplanes are at the same height.
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Determine the height: After finding the intersection point, read the y-coordinate at that point, which will give you the height at that time.
Once you have these values, you can fill in the blanks as follows:
- The airplanes are at the same height at approximately [insert estimated time] minutes.
- The height of the airplanes at that time is approximately [insert estimated height] feet.
Feel free to provide the estimated values you found, and I can assist you further!