Which culture was the first mesoamerican civilization? a. the aztecs b. the mayas c. the olmecs d. the zapotecs

This chart shows american troop strength during what conflict? a) gulf war b) korean war c) vietnam war d) world war ii

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.

Who was the 2nd president of the united states?