Fossil fuels such as coal, oil, amd natrual gas were formed over millions of years ago by

Awatershed is a piece of land that drains water into a particular stream, lake, or river. which of the following factors often negatively impacts the water quality in a watershed? a.) wetlands b.) pollution c.) irrigation d.)rainfall

The yellow river is also known as the huang he river? true or false

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4