In a right triangle ABC, tan (a) = 20/21. find sin (a) and cos (a)

Which period represents the last two million years of geologic time?

Suppose you hear a weather forecaster say a front is forming over your area. However, you don't hear what kind of front it is. What conclusion can you draw about the coming weather? (Type a full answer)

Over the past several years, the amount of carbon dioxide in the atmosphere has increased. With more carbon dioxide in the atmosphere, more heat is absorbed and retained causing an increase in global temperatures ...

Temperatures at the top of Earth's atmosphere can exceed 1 million Kelvin where the atmosphere merges with the solar wind. If an astronaut would stand unprotected in this region, what would happen to her body temperature?

Who was one of the leading european explorers of the pacific world?

How does the physical geography of South Asia impact human cultures? Write 1 paragraph (5-8 sentences).

What is cartesian product?

11. Which five South Asian cities have the largest populations?

Some 2.5 million people currently live in sahara, most of these in egypt, mauritania, morocco and algeria true or false

Compare the aquatic species mortality on the east and west coast