The density of the atmosphere at sea level is 1.29kgm-3. Assume that is does not change with altitude. Then how high would the atmosphere extend? (g=9.8mm-2)

The density of the atmosphere at sea level is 1.29kgm-3. Assume that

1.	The density of the atmosphere at sea level is 1.29kgm-3. Assume that is does not change with altitude. Then how high would the atmosphere extend? (g=9.8mm-2)
A.	0.5km
B.	0.8km
C.	8km
D.	80km
Answer» D. 80km