Answer:
12 students
Step-by-step explanation:
Given

Required
Determine the number of students that eat lunch once a week
In Sets;
If out of 9, at least 7 eats one a week then
9 - 7 eats lunch once a week

<em>In other words;</em>
2 out of 9 students eat lunch once a week
Number of students in this category is then calculated as thus;




48 is the lowest denominator
Hope this helps!
Answer: 10 inches
Step-by-step explanation:
200/10 = 20
20 x 0.5 = 10