Answer:
21
Step-by-step explanation:
20 x 10 = 200 so 20 students sleep for 9 hours
that leaves 10
since 10 is half of 20, half of 2 is 1 so that last 10 = 1 student,
making 21 students
The midpoint of 18.6 and 18.5 is 18.55
Every number times 5 the last digital number will be 5 or 0
Its 0.5. Which would be in fraction form 5/10 meaning its 5 tenths.