Final answer:
Nine students answered 55% of the questions correctly, Half the students answered 70% or 75% of the questions correctly, Eight students answered more than 80% of the questions correctly, Ten students answered 100% of the questions correctly.
Step-by-step explanation:
The stem and leaf plot shows the percentage of questions on a Spanish test that were answered correctly by each student in a class. From the stemplot, we can see that nine students answered 55% of the questions correctly. So, statement A is true. Looking at the stemplot again, we can see that there are leaves for 70% and 75%. Half the students fell into these categories, so statement B is also true. There are no leaves above 80%, so statement C is false. According to the stemplot, there are no leaves for 100%, so statement D is false as well.