So first you will have to put the numbers in order so it will be
3,6,7,9,9,10
and then you find the middle of the set which are 7 and 9.
There are two medians and so you will have to find the average of the two numbers which is 8
so the median of this set is 8
Rivers are divided by watershed boundaries, lines that follow the hirght og the loand and the water drians off in the opposite directions. In nature it is virtually impossible to see where oneregion of vegetation starts and ends. Natural vegetation regions gradually change through transition zones.
Your answer would be Earth's rotation on its axis. That is the reason we even have different time zones.
A deep water wave is a wave way under water. A shallow water wave is a normal wave that you see on top of the water.