9,660/0.5m3=19.320kg/m^3
Get it from this equation m=pV
p is density ,V volume, m mass
Hope it helps ;)
Answer: 4.5 looks the most reasonable to me.
Step-by-step explanation:
Answer: Option A)
is the correct expansion.
Explanation:
on applying binomial theorem, 
Here a=3c,
and n=6,
Thus, 
⇒ 
⇒
⇒
⇒
The correct answer is d 58