Final answer:
The owner of a repair service company can bill for 24.9 hours per 30-hour week for a repairperson, corresponding to 83% of the total hours worked.
Step-by-step explanation:
The owner of a repair service company is trying to determine the number of hours per 30-hour week they can bill for a repairperson. Given that the owner can bill for only 83% of the hours, we calculate the billable hours as follows:
Billable hours = 83% of 30 hours
Billable hours = 0.83 × 30 hours
Billable hours = 24.9 hours
Therefore, the number of hours per 30-hour week the owner can bill for a repairperson is 24.9 hours. This corresponds to option (a) 24.9 hours.