Fill in the blank
For a school project, Robert records the motion of a snail and plots a position-time graph of the data.
From the graph, the speed of the snail in the first 20 seconds is ________
centimeter/second. After that, the snail remains in the same place for ________
seconds.
![Fill in the blank For a school project Robert records the motion of a snail and plots a positiontime graph of the data From the graph the speed of the snail in class=](https://us-static.z-dn.net/files/dfe/9a8f645acab5be81edf12ef9f2d7e470.jpg)