Given that,
A car uses a litre of petrol to travel 4 km.
To find,
How many litres will it use to travel 32 kilometres.
Solution,
We have,
1 litre = 4 km
or
1 km = (1/4) litre 
Let it will use x litres to travel 32 km.
32 km = (32/4) litres
= 8 litres
Hence, 8 litres it will use to travel 32 km.
 
        
             
        
        
        
The second one is the correct answer .
        
             
        
        
        
Answer:
81x^4/16  (81x to the fourth over 16)
Step-by-step explanation:
First you apply the exponent rule: (a/b)^c  ->  a^c/b^c
So it looks like this: 3x^2/4^2
Then you apply the exponent to the whole thing, and 3^4 is 81, x^4 stays like that, and 2^4 is 16
You can't simplify any more after that so that's your answer
Hope this helps! 
 
        
             
        
        
        
a) Fraction Notation - 50/100 (1/2 Simplified)
    Decimal Notation - 0.50
b) Depends on how many cattle they have, but they sold have of it so 1/2 again?
This Should Be Right?