Final answer:
The widest range of scores to receive a B in the class would be from 60 to 89, and using interval notation, it would be [60, 89].
Step-by-step explanation:
To find the widest range of scores on the final exam to receive a B in the class, we need to determine the minimum and maximum scores within the B range. From the information given, we can see that most scores on the exam were in the range of 70-89, with a few scoring in the 60-69 range, and a few in the 90-100 range.
So, the widest range of scores to receive a B in the class would be from 60 to 89, since some students scored in the range of 60-69 and others in the range of 70-89.
Therefore, the widest range of scores on the final exam to receive a B in the class, using interval notation, would be [60, 89].