To simplify this, you would have to turn b^-2 into a positive exponent.
To do this, we have to flip b^-2, which would get rid of the negate from the exponent: -2
3a^4 b^-2 c^3 / b^-2
Then we get the answer:
3a^4 c^3
------------
b^-2
I have a picture to clarify!
I hope this helped, let me know if you don't understand! ^.^
The greatest common factor of the number 6 is 1
If one equals 3 then 3 times 6 = 18 pounds
Length=x
Breadth=1/3x
(x+1/3x)×2=80
4/3x×2=80
8/3x=80
x=30
Length=30
Breadth=1/3×30=10
Hope my answer helped u :)