PLS HURRY American Robert Gray’s most important accomplishment was

reaching the Pacific Ocean.
exploring the Louisiana Purchase.
claiming Alaska for the United States.
claiming the Columbia River for the United States.

What is the area of the trapezoid shown ?

The 20th amendment, also called the lame duck amendment, decreased the amount of time between the presidential election and the inaugration of the new president. what are the advancements that allowed for this amendment?

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b.the united states should end slavery. c.the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii