Answer:
2 Gallons.
Step-by-step explanation:
If 8 gallons are lost in one hour, then 4 will be lost in 30 minutes. Half of thirty minutes is 15 minutes, and half of 4 is 2.
we know that
cup of flour is used to make
dinner rolls.
Part a) How much flour is needed to make one dinner roll?
by using proportion

therefore
the answer Part a) is
To make one dinner roll is needed
cup of flour
Part b) How many cups of flour are needed to make 3 dozen dinner rolls?
Multiply the value obtained in part a) by 
so


therefore
the answer Part b) is
To make
dozen dinner rolls are needed
cup of flour
Part c) How many rolls can you make with 5 2/3 cups of flour?

by using proportion

therefore
the answer part c) is
rolls
Since every female chicken lays 4 eggs, if you have one chicken you have 4 eggs, if you have two chicken you have 8 eggs, and so on.
We can even build a little table to show some values:

So, as you can see, the ratio between the number of eggs and the number of female chicken is 4.
3*4*3-2*4^2 = 36-32 = 4
hope helped