6x6x6x6x6x6x6x6x6x6x6x6x5x5x5x5x5=

6802444800000

Explanation:

You can simply this by using exponents.

6^12 ⋅ 5^5 = 6802444800000

6.8024448e+12

Explanation:

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."