19. Track The sketch at the right shows the distance three runners travel during a race. Describe what occurs at times A, B, C, and D. In what order do the runners finish?
Hmm -- The sketch at the right seems to be invisible. I'm good -- but I still haven't developed the skill to see what's invisible.
To describe what occurs at times A, B, C, and D, we need to analyze the sketch and determine the positions of the runners at each time point.
First, let's label the runners as Runner 1, Runner 2, and Runner 3.
At time A, Runner 1 is in the lead, followed by Runner 2 and Runner 3. This indicates that Runner 1 is leading the race at the beginning.
At time B, Runner 2 overtakes Runner 1 and takes the lead. Runner 3 remains in the same position.
At time C, Runner 3 starts to catch up and surpass both Runner 1 and Runner 2, taking the lead. Runner 1 is behind Runner 3, and Runner 2 is in the last position.
At time D, Runner 3 maintains the lead, followed by Runner 1 and Runner 2.
To determine the order in which the runners finish, we compare their positions at the end of the race (time D). In this case, Runner 3 finishes first, followed by Runner 1 in second place, and finally Runner 2 in third place.
In summary:
- At time A: Runner 1 leads, followed by Runner 2 and Runner 3.
- At time B: Runner 2 takes the lead, followed by Runner 1 and Runner 3.
- At time C: Runner 3 takes the lead, followed by Runner 1 and Runner 2.
- At time D: Runner 3 finishes first, followed by Runner 1 and Runner 2.