A long-distance runner out for a workout runs 4 kilometers in 20 minutes, walks for a distance of 1 kilometer, which takes 10 minutes, and then rests in one spot for 10 minutes. After that, she runs
another 6 kilometers in 35 minutes. Which of the following are true with respect to her motion?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?