Answer:
0.5 liters of milk are available per child.
Step-by-step explanation:
Amount of milk available per children:
The amount of milk, in liters, available for x children is given by:

50 children are present on a day
This means that 
How much milk is available per child?
This is m(50). So

0.5 liters of milk are available per child.
Answer:
A B D E F G
Step-by-step explanation:
Integer is a whole number (not a fraction)
Answer:
n = 6
Step-by-step explanation:
1/2n + 3 = 6
1/2n = 3
n = 6
257,650 rounded to the nearest hundred is 257,700 because it is right at the border (50) we have to round up.