When the Earth first formed it had large quantities of water ...

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When the Earth first formed it had large quantities of water vapor in its atmosphere while today the levels of water vapor are much lower. Where did most of the water vapor go?
 
  A) it condensed into the oceans
  B) it escaped into space
  C) it froze forming the polar
  D) became chemically incorporated into rocks in the crust

Question 2

In adding the numbers 420.77, 13.821, and 2317.8 (a) the result should be rounded to how many significant figures? (b) what is the sum?
 
  What will be an ideal response?

[Missbam101]

Answer to Question 1

A

Answer to Question 2

(a) 5 sig-figs
(b) 2752.4

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TYSM

[Zebsrer]

Wow, this really help