Arobot can complete 8 tasks in 5/6 hour. what is the unit rate per task? what is the unit rate per hour?

Given:
8 tasks
5/6 hours total

Unit rate per task:

5/6 hours ÷ 8 tasks = 5/6 * 1/8 = 5/48 or 0.10 hours per task

0.10 hours x 60 minutes/hour = 6 minutes per task.

Unit rate per hour:

8 tasks ÷ 5/6 hours = 8 * 6/5 = 48/5 = 9.60 tasks per hour or rounded to 10 tasks per hour.

The answer would be: b