Answer:
1) a) 
, b) 
, c) 
.
2) a) 
, b) 
, c) 
.
Explanation:
The scale factor is defined by the following expression:
(1)
Where:
- Scale factor.
- Scale distance, in centimetres.
- Real distance, in centimetres.
1) If we know that 
, 
, 
and 
, then the actual distances in metres are:
2) If we know that , 
, 
and 
, then the actual distance in kilometres is:
Physical process is caused it’s formation
Answer:
Cover all or most of the sky.
Explanation:
They are not thin and wizpy, or round and fluffy, or form at high altitudes.
