Answer: 34 hours (choice C)
Step-by-step explanation
I'll convert the dot plot to a frequency chart.

Form a new column where we multiply each hour value with its corresponding frequency (example: 1.5*5 = 7.5)

Then add up everything in that new column to get the total number of hours.
7.5+4+2.5+9+7+4 = 34 hours is the final answer.