What is the numerical value of ? Express your answer using the ...

[tiffannnnyyyyyy]

What is the numerical value of ? Express your answer using the correct number of significant figures.
 
  A) 10-3
  B) 1  10-3
  C) 1.2  10-3
  D) 1.23  10-3
  E) 1.227  10-3

Question 2

The reason why a hot air balloon goes up in the air is that
 
  A) the number of air molecules inside the balloon increases.
  B) the pressure inside the balloon increases.
  C) the hot air inside the balloon is less dense.
  D) All of the above

[bd5255]

Answer to Question 1

D

Answer to Question 2

C

[tiffannnnyyyyyy]

Excellent

[dantucker]

TYSM