The vikings invasions of western europe lasted from the.. a. 9th century and into 11th century b. 12th century and into the 15th century c. 15th century and into the 18th century d. 4th century and into the 7th century e. 6th century and into the 9th century

the act of deciding on matters of the economy. economic decision making is routinely conducted by finance ministers, economic advisors, heads of major central banks and business leaders and can have profound effects on a major economy.

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 !