A quart is one half of a quart and a half is half of a gallon. A gallon is four quarts.
Answer:
02 High Schools would be selected from the stratum with a percent-free-lunch value of 40 less than or equals x.
Step-by-step explanation:
As the sample size needed is 25 and total schools are 100 so this indicate 1 school in each 4 schools is to be selected. This is given as

Now as the schools with percent free lunch are 8 so now

So only 2 schools will be selected in this regard.
7.2 and 11.16666666666666... (going on forever.) Another way to say this is 11.16 with a line over the 6 to mean the six goes on forever. I may be wrong.