The study of history you to get a good grade recognize contributions of past civilizations remember famous people and events connect the past, present, and future identify patterns

The main aim of studying history is to understand the contributions that led to civilization that were essential to human society and the changes that they promoted.

Explanation:

Learning the past failures and success of the American was another reason for studying the history, this helped. Finally is to identify patterns and their occurrences that repeatedly happen that are threatening.

Finally studying history-helped historians to understand events that were happening severally and finding out counter measured that will help them positively change society.

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 !