B. Situation A
C. Situation B
Explanation: Situation A has more students on the higher numbers.
Second Explanation: Situation B has numbers on the 70.
Answer:

Step-by-step explanation:
See attached file for complete work.
I am not sure but I think the answer is of second one.
Answer: 8.1 $
Step-by-step explanation: 18 percent of 45 is 8.1 ez math hope this helps.