Which Era below is associated with the date of September 17, 1787?
Revolutionary Era
O
Creating a Government Era
Manifest Destiny Era
O
Early Republic Era

The Early Republic Period

Explanation:

The Early Republic Period is referring to the date of September 17, 1787, because that was the era that lasted from 1780 till 1830.

what are local authorities doing to fix the problem

explanation:

what are local authorities doing to fix the problem

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean