The end of the stone age (around 10,000-12,000 years ago) witnessed the change from hunter-gatherer societies to agricultural societies. this led to the rise of civilization. one of the societal changes that occurred at this time was that people

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !

answer; depression and breathing related sleep disorder(independent);

answer: corporations and the wealthy cannot donate an excessive amount. (c)